diff --git a/src/lib_client_base/client_node_rpcs.ml b/src/lib_client_base/client_node_rpcs.ml
index c47313564..fd25d3f4e 100644
--- a/src/lib_client_base/client_node_rpcs.ml
+++ b/src/lib_client_base/client_node_rpcs.ml
@@ -24,9 +24,9 @@ let inject_block cctxt
   call_err_service0 cctxt Services.inject_block
     { raw ; blocking = not async ; force ; net_id ; operations }
 
-let inject_operation cctxt ?(async = false) ?force ?net_id operation =
+let inject_operation cctxt ?(async = false) ?net_id operation =
   call_err_service0 cctxt Services.inject_operation
-    (operation, not async, net_id, force)
+    (operation, not async, net_id)
 
 let inject_protocol cctxt ?(async = false) ?force protocol =
   call_err_service0 cctxt Services.inject_protocol
diff --git a/src/lib_client_base/client_node_rpcs.mli b/src/lib_client_base/client_node_rpcs.mli
index a8e7867fc..b92ffc880 100644
--- a/src/lib_client_base/client_node_rpcs.mli
+++ b/src/lib_client_base/client_node_rpcs.mli
@@ -28,7 +28,7 @@ val inject_block:
 
 val inject_operation:
   #Client_rpcs.ctxt ->
-  ?async:bool -> ?force:bool -> ?net_id:Net_id.t ->
+  ?async:bool -> ?net_id:Net_id.t ->
   MBytes.t ->
   Operation_hash.t tzresult Lwt.t
 
diff --git a/src/lib_embedded_client_alpha/client_baking_endorsement.ml b/src/lib_embedded_client_alpha/client_baking_endorsement.ml
index d524ff97c..416080470 100644
--- a/src/lib_embedded_client_alpha/client_baking_endorsement.ml
+++ b/src/lib_embedded_client_alpha/client_baking_endorsement.ml
@@ -89,7 +89,7 @@ let get_signing_slots cctxt ?max_priority block delegate level =
   return slots
 
 let inject_endorsement (cctxt : Client_commands.full_context)
-    block level ?async ?force
+    block level ?async
     src_sk source slot =
   let block = Client_rpcs.last_baked_block block in
   Client_node_rpcs.Blocks.info cctxt block >>=? fun bi ->
@@ -102,7 +102,7 @@ let inject_endorsement (cctxt : Client_commands.full_context)
     () >>=? fun bytes ->
   let signed_bytes = Ed25519.Signature.append src_sk bytes in
   Client_node_rpcs.inject_operation
-    cctxt ?force ?async ~net_id:bi.net_id signed_bytes >>=? fun oph ->
+    cctxt ?async ~net_id:bi.net_id signed_bytes >>=? fun oph ->
   State.record_endorsement cctxt level bi.hash slot oph >>=? fun () ->
   return oph
 
@@ -122,7 +122,7 @@ let check_endorsement cctxt level slot =
 
 
 let forge_endorsement (cctxt : Client_commands.full_context)
-    block ?(force = false)
+    block
     ~src_sk ?slot ?max_priority src_pk =
   let block = Client_rpcs.last_baked_block block in
   let src_pkh = Ed25519.Public_key.hash src_pk in
@@ -136,12 +136,9 @@ let forge_endorsement (cctxt : Client_commands.full_context)
         | slot::_ -> return slot
         | [] -> cctxt#error "No slot found at level %a" Raw_level.pp level
   end >>=? fun slot ->
-  begin
-    if force then return ()
-    else check_endorsement cctxt level slot
-  end >>=? fun () ->
+  check_endorsement cctxt level slot >>=? fun () ->
   inject_endorsement cctxt
-    block level ~force
+    block level
     src_sk src_pk slot
 
 
@@ -290,7 +287,7 @@ let endorse cctxt state =
            lwt_debug "Endorsing %a for %s (slot %d)!"
              Block_hash.pp_short hash name slot >>= fun () ->
            inject_endorsement cctxt
-             b level ~async:true ~force:true
+             b level ~async:true
              sk pk slot >>=? fun oph ->
            cctxt#message
              "Injected endorsement for block '%a' \
diff --git a/src/lib_embedded_client_alpha/client_baking_endorsement.mli b/src/lib_embedded_client_alpha/client_baking_endorsement.mli
index febc5a6ad..3d6089a7c 100644
--- a/src/lib_embedded_client_alpha/client_baking_endorsement.mli
+++ b/src/lib_embedded_client_alpha/client_baking_endorsement.mli
@@ -10,7 +10,6 @@
 val forge_endorsement:
   Client_commands.full_context ->
   Client_proto_rpcs.block ->
-  ?force:bool ->
   src_sk:secret_key ->
   ?slot:int ->
   ?max_priority:int ->
diff --git a/src/lib_embedded_client_alpha/client_baking_forge.ml b/src/lib_embedded_client_alpha/client_baking_forge.ml
index 16fa21344..3ad8ebbbe 100644
--- a/src/lib_embedded_client_alpha/client_baking_forge.ml
+++ b/src/lib_embedded_client_alpha/client_baking_forge.ml
@@ -379,7 +379,7 @@ let insert_block
   begin
     safe_get_unrevealed_nonces cctxt (`Hash bi.hash) >>= fun nonces ->
     Client_baking_revelation.forge_seed_nonce_revelation
-      cctxt ~force:true (`Hash bi.hash) (List.map snd nonces)
+      cctxt (`Hash bi.hash) (List.map snd nonces)
   end >>= fun _ignore_error ->
   if Fitness.compare state.best.fitness bi.fitness < 0 then begin
     state.best <- bi ;
diff --git a/src/lib_embedded_client_alpha/client_baking_lib.ml b/src/lib_embedded_client_alpha/client_baking_lib.ml
index 268d95de9..e85af57bc 100644
--- a/src/lib_embedded_client_alpha/client_baking_lib.ml
+++ b/src/lib_embedded_client_alpha/client_baking_lib.ml
@@ -30,10 +30,10 @@ let bake_block (cctxt : Client_commands.full_context) block
   cctxt#message "Injected block %a" Block_hash.pp_short block_hash >>= fun () ->
   return ()
 
-let endorse_block cctxt ?force ?max_priority delegate =
+let endorse_block cctxt ?max_priority delegate =
   Client_keys.get_key cctxt delegate >>=? fun (_src_name, src_pk, src_sk) ->
   Client_baking_endorsement.forge_endorsement cctxt
-    cctxt#block ?force ?max_priority ~src_sk src_pk >>=? fun oph ->
+    cctxt#block ?max_priority ~src_sk src_pk >>=? fun oph ->
   cctxt#answer "Operation successfully injected in the node." >>= fun () ->
   cctxt#answer "Operation hash is '%a'." Operation_hash.pp oph >>= fun () ->
   return ()
@@ -49,14 +49,14 @@ let get_predecessor_cycle (cctxt : #Client_commands.logger) cycle =
           Cycle.pp cycle
   | Some cycle -> Lwt.return cycle
 
-let do_reveal cctxt ?force block blocks =
+let do_reveal cctxt block blocks =
   let nonces = List.map snd blocks in
   Client_baking_revelation.forge_seed_nonce_revelation cctxt
-    block ?force nonces >>=? fun () ->
+    block nonces >>=? fun () ->
   Client_proto_nonces.dels cctxt (List.map fst blocks) >>=? fun () ->
   return ()
 
-let reveal_block_nonces (cctxt : Client_commands.full_context) ?force block_hashes =
+let reveal_block_nonces (cctxt : Client_commands.full_context) block_hashes =
   Lwt_list.filter_map_p
     (fun hash ->
        Lwt.catch
@@ -80,13 +80,13 @@ let reveal_block_nonces (cctxt : Client_commands.full_context) ?force block_hash
       | Some nonce ->
           return (Some (bi.hash, (bi.level.level, nonce))))
     block_infos >>=? fun blocks ->
-  do_reveal cctxt ?force cctxt#block blocks
+  do_reveal cctxt cctxt#block blocks
 
-let reveal_nonces cctxt ?force () =
+let reveal_nonces cctxt () =
   let block = Client_rpcs.last_baked_block cctxt#block in
   Client_baking_forge.get_unrevealed_nonces
-    cctxt ?force block >>=? fun nonces ->
-  do_reveal cctxt ?force cctxt#block nonces
+    cctxt block >>=? fun nonces ->
+  do_reveal cctxt cctxt#block nonces
 
 let run_daemon cctxt ?max_priority ~endorsement_delay delegates ~endorsement ~baking ~denunciation =
   Client_baking_daemon.run cctxt
diff --git a/src/lib_embedded_client_alpha/client_baking_lib.mli b/src/lib_embedded_client_alpha/client_baking_lib.mli
index 52f261540..f4dcffb2b 100644
--- a/src/lib_embedded_client_alpha/client_baking_lib.mli
+++ b/src/lib_embedded_client_alpha/client_baking_lib.mli
@@ -21,7 +21,6 @@ val bake_block:
 (** Endorse a block *)
 val endorse_block:
   Client_commands.full_context ->
-  ?force:bool ->
   ?max_priority:int ->
   Client_keys.Public_key_hash.t ->
   unit Error_monad.tzresult Lwt.t
@@ -35,14 +34,12 @@ val get_predecessor_cycle:
 (** Reveal the nonces used to bake each block in the given list *)
 val reveal_block_nonces :
   Client_commands.full_context ->
-  ?force:bool ->
   Block_hash.t list ->
   unit Error_monad.tzresult Lwt.t
 
 (** Reveal all unrevealed nonces *)
 val reveal_nonces :
   Client_commands.full_context ->
-  ?force:bool ->
   unit ->
   unit Error_monad.tzresult Lwt.t
 
diff --git a/src/lib_embedded_client_alpha/client_baking_main.ml b/src/lib_embedded_client_alpha/client_baking_main.ml
index 0562e369d..53cec7762 100644
--- a/src/lib_embedded_client_alpha/client_baking_main.ml
+++ b/src/lib_embedded_client_alpha/client_baking_main.ml
@@ -29,14 +29,13 @@ let commands () =
            else (endorsement, baking, denunciation) in
          run_daemon cctxt ?max_priority ~endorsement_delay ~endorsement ~baking ~denunciation delegates) ;
     command ~group ~desc: "Forge and inject an endorsement operation"
-      (args2 force_switch max_priority_arg)
+      (args1 max_priority_arg)
       (prefixes [ "endorse"; "for" ]
        @@ Client_keys.Public_key_hash.alias_param
          ~name:"baker" ~desc: "name of the delegate owning the endorsement right"
        @@ stop)
-      (fun (force, max_priority) (_, delegate) cctxt ->
-         endorse_block cctxt
-           ~force ?max_priority delegate) ;
+      (fun max_priority (_, delegate) cctxt ->
+         endorse_block cctxt ?max_priority delegate) ;
     command ~group ~desc: "Forge and inject block using the delegate rights"
       (args3 max_priority_arg force_switch free_baking_switch)
       (prefixes [ "bake"; "for" ]
@@ -47,16 +46,15 @@ let commands () =
          bake_block cctxt cctxt#block
            ~force ?max_priority ~free_baking delegate) ;
     command ~group ~desc: "Forge and inject a seed-nonce revelation operation"
-      (args1 force_switch)
+      no_options
       (prefixes [ "reveal"; "nonce"; "for" ]
        @@ seq_of_param Block_hash.param)
-      (fun force block_hashes cctxt ->
-         reveal_block_nonces cctxt
-           ~force block_hashes) ;
+      (fun () block_hashes cctxt ->
+         reveal_block_nonces cctxt block_hashes) ;
     command ~group ~desc: "Forge and inject redemption operations"
-      (args1 force_switch)
+      no_options
       (prefixes [ "reveal"; "nonces" ]
        @@ stop)
-      (fun force cctxt ->
-         reveal_nonces cctxt ~force ()) ;
+      (fun () cctxt ->
+         reveal_nonces cctxt ()) ;
   ]
diff --git a/src/lib_embedded_client_alpha/client_baking_revelation.ml b/src/lib_embedded_client_alpha/client_baking_revelation.ml
index 0efbc91c7..e9421da3f 100644
--- a/src/lib_embedded_client_alpha/client_baking_revelation.ml
+++ b/src/lib_embedded_client_alpha/client_baking_revelation.ml
@@ -9,7 +9,7 @@
 
 open Tezos_context
 
-let inject_seed_nonce_revelation rpc_config block ?force ?async nonces =
+let inject_seed_nonce_revelation rpc_config block ?async nonces =
   let operations =
     List.map
       (fun (level, nonce) ->
@@ -19,13 +19,13 @@ let inject_seed_nonce_revelation rpc_config block ?force ?async nonces =
   Client_proto_rpcs.Helpers.Forge.Anonymous.operations rpc_config
     block ~branch:bi.hash operations >>=? fun bytes ->
   Client_node_rpcs.inject_operation
-    rpc_config ?force ?async ~net_id:bi.net_id
+    rpc_config ?async ~net_id:bi.net_id
     bytes >>=? fun oph ->
   return oph
 
 let forge_seed_nonce_revelation
     (cctxt: Client_commands.full_context)
-    block ?(force = false) nonces =
+    block nonces =
   Client_node_rpcs.Blocks.hash cctxt block >>=? fun hash ->
   match nonces with
   | [] ->
@@ -33,7 +33,7 @@ let forge_seed_nonce_revelation
         Block_hash.pp_short hash >>= fun () ->
       return ()
   | _ ->
-      inject_seed_nonce_revelation cctxt block ~force nonces >>=? fun oph ->
+      inject_seed_nonce_revelation cctxt block nonces >>=? fun oph ->
       cctxt#answer
         "Operation successfully injected %d revelation(s) for %a."
         (List.length nonces)
diff --git a/src/lib_embedded_client_alpha/client_baking_revelation.mli b/src/lib_embedded_client_alpha/client_baking_revelation.mli
index 4527c7b0b..a11990629 100644
--- a/src/lib_embedded_client_alpha/client_baking_revelation.mli
+++ b/src/lib_embedded_client_alpha/client_baking_revelation.mli
@@ -10,7 +10,6 @@
 val inject_seed_nonce_revelation:
   #Client_rpcs.ctxt ->
   Client_proto_rpcs.block ->
-  ?force:bool ->
   ?async:bool ->
   (Raw_level.t * Nonce.t) list ->
   Operation_hash.t tzresult Lwt.t
@@ -18,6 +17,5 @@ val inject_seed_nonce_revelation:
 val forge_seed_nonce_revelation:
   Client_commands.full_context ->
   Client_proto_rpcs.block ->
-  ?force:bool ->
   (Raw_level.t * Nonce.t) list ->
   unit tzresult Lwt.t
diff --git a/src/lib_embedded_client_alpha/client_proto_context.ml b/src/lib_embedded_client_alpha/client_proto_context.ml
index 2dcef8a87..36a04aa60 100644
--- a/src/lib_embedded_client_alpha/client_proto_context.ml
+++ b/src/lib_embedded_client_alpha/client_proto_context.ml
@@ -43,7 +43,7 @@ let parse_expression arg =
        (Michelson_v1_parser.parse_expression arg))
 
 let transfer rpc_config
-    block ?force ?branch
+    block ?branch
     ~source ~src_pk ~src_sk ~destination ?arg ~amount ~fee () =
   get_branch rpc_config block branch >>=? fun (net_id, branch) ->
   begin match arg with
@@ -66,11 +66,11 @@ let transfer rpc_config
   Client_proto_rpcs.Helpers.apply_operation rpc_config block
     predecessor oph bytes (Some signature) >>=? fun contracts ->
   Client_node_rpcs.inject_operation
-    rpc_config ?force ~net_id signed_bytes >>=? fun injected_oph ->
+    rpc_config ~net_id signed_bytes >>=? fun injected_oph ->
   assert (Operation_hash.equal oph injected_oph) ;
   return (oph, contracts)
 
-let originate rpc_config ?force ?net_id ~block ?signature bytes =
+let originate rpc_config ?net_id ~block ?signature bytes =
   let signed_bytes =
     match signature with
     | None -> bytes
@@ -81,7 +81,7 @@ let originate rpc_config ?force ?net_id ~block ?signature bytes =
     predecessor oph bytes signature >>=? function
   | [ contract ] ->
       Client_node_rpcs.inject_operation
-        rpc_config ?force ?net_id signed_bytes >>=? fun injected_oph ->
+        rpc_config ?net_id signed_bytes >>=? fun injected_oph ->
       assert (Operation_hash.equal oph injected_oph) ;
       return (oph, contract)
   | contracts ->
@@ -89,13 +89,8 @@ let originate rpc_config ?force ?net_id ~block ?signature bytes =
         "The origination introduced %d contracts instead of one."
         (List.length contracts)
 
-let operation_submitted_message (cctxt : #Client_commands.logger) ?(force=false) ?(contracts = []) oph =
-  begin
-    if not force then
-      cctxt#message "Operation successfully injected in the node."
-    else
-      Lwt.return_unit
-  end >>= fun () ->
+let operation_submitted_message (cctxt : #Client_commands.logger) ?(contracts = []) oph =
+  cctxt#message "Operation successfully injected in the node." >>= fun () ->
   cctxt#message "Operation hash is '%a'." Operation_hash.pp oph >>= fun () ->
   Lwt_list.iter_s
     (fun c ->
@@ -104,7 +99,7 @@ let operation_submitted_message (cctxt : #Client_commands.logger) ?(force=false)
          Contract.pp c)
     contracts >>= return
 
-let originate_account ?(force=false) ?branch
+let originate_account ?branch
     ~source ~src_pk ~src_sk ~manager_pkh
     ?delegatable ?delegate ~balance ~fee block rpc_config () =
   get_branch rpc_config block branch >>=? fun (net_id, branch) ->
@@ -116,16 +111,16 @@ let originate_account ?(force=false) ?branch
     ~counter ~balance ~spendable:true
     ?delegatable ?delegatePubKey:delegate ~fee () >>=? fun bytes ->
   let signature = Ed25519.sign src_sk bytes in
-  originate rpc_config ~force ~block ~net_id ~signature bytes
+  originate rpc_config ~block ~net_id ~signature bytes
 
-let faucet ?force ?branch ~manager_pkh block rpc_config () =
+let faucet ?branch ~manager_pkh block rpc_config () =
   get_branch rpc_config block branch >>=? fun (net_id, branch) ->
   Client_proto_rpcs.Helpers.Forge.Anonymous.faucet
     rpc_config block ~branch ~id:manager_pkh () >>=? fun bytes ->
-  originate rpc_config ?force ~net_id ~block bytes
+  originate rpc_config ~net_id ~block bytes
 
 let delegate_contract rpc_config
-    block ?force ?branch
+    block ?branch
     ~source ?src_pk ~manager_sk
     ~fee delegate_opt =
   get_branch rpc_config block branch >>=? fun (net_id, branch) ->
@@ -139,7 +134,7 @@ let delegate_contract rpc_config
   let signed_bytes = Ed25519.Signature.concat bytes signature in
   let oph = Operation_hash.hash_bytes [ signed_bytes ] in
   Client_node_rpcs.inject_operation
-    rpc_config ?force ~net_id signed_bytes >>=? fun injected_oph ->
+    rpc_config ~net_id signed_bytes >>=? fun injected_oph ->
   assert (Operation_hash.equal oph injected_oph) ;
   return oph
 
@@ -209,7 +204,6 @@ let save_contract ~force cctxt alias_name contract =
 let originate_contract
     ~fee
     ~delegate
-    ?(force=false)
     ?(delegatable=true)
     ?(spendable=false)
     ~initial_storage
@@ -234,4 +228,4 @@ let originate_contract
     ~delegatable ?delegatePubKey:delegate
     ~script:{ code ; storage } ~fee () >>=? fun bytes ->
   let signature = Ed25519.sign src_sk bytes in
-  originate cctxt ~force ~block ~signature bytes
+  originate cctxt ~block ~signature bytes
diff --git a/src/lib_embedded_client_alpha/client_proto_context.mli b/src/lib_embedded_client_alpha/client_proto_context.mli
index e20cdeca7..a4c331d20 100644
--- a/src/lib_embedded_client_alpha/client_proto_context.mli
+++ b/src/lib_embedded_client_alpha/client_proto_context.mli
@@ -44,7 +44,6 @@ val set_delegate :
 
 val operation_submitted_message :
   #Client_commands.logger ->
-  ?force:bool ->
   Operation_hash.t ->
   unit tzresult Lwt.t
 
@@ -55,7 +54,6 @@ val source_to_keys:
   (public_key * secret_key) tzresult Lwt.t
 
 val originate_account :
-  ?force:bool ->
   ?branch:int ->
   source:Contract.t ->
   src_pk:public_key ->
@@ -78,7 +76,6 @@ val save_contract :
 
 val operation_submitted_message :
   #Client_commands.logger ->
-  ?force:bool ->
   ?contracts:Contract.t list ->
   Operation_hash.t ->
   unit tzresult Lwt.t
@@ -86,7 +83,6 @@ val operation_submitted_message :
 val originate_contract:
   fee:Tez.t ->
   delegate:public_key_hash option ->
-  ?force:bool ->
   ?delegatable:bool ->
   ?spendable:bool ->
   initial_storage:string ->
@@ -100,7 +96,6 @@ val originate_contract:
   (Operation_hash.t * Contract.t) tzresult Lwt.t
 
 val faucet :
-  ?force:bool ->
   ?branch:int ->
   manager_pkh:public_key_hash ->
   Client_rpcs.block ->
@@ -110,7 +105,6 @@ val faucet :
 val transfer :
   #Client_rpcs.ctxt ->
   Client_proto_rpcs.block ->
-  ?force:bool ->
   ?branch:int ->
   source:Contract.t ->
   src_pk:public_key ->
diff --git a/src/lib_embedded_client_alpha/client_proto_context_commands.ml b/src/lib_embedded_client_alpha/client_proto_context_commands.ml
index 07cf62756..bd595dbd3 100644
--- a/src/lib_embedded_client_alpha/client_proto_context_commands.ml
+++ b/src/lib_embedded_client_alpha/client_proto_context_commands.ml
@@ -116,17 +116,17 @@ let commands () =
       end ;
 
     command ~group ~desc: "set the delegate of a contract"
-      (args2 fee_arg force_switch)
+      (args1 fee_arg)
       (prefixes [ "set" ; "delegate" ; "for" ]
        @@ ContractAlias.destination_param ~name:"src" ~desc:"source contract"
        @@ prefix "to"
        @@ Public_key_hash.alias_param
          ~name: "mgr" ~desc: "New delegate of the contract"
        @@ stop)
-      begin fun (fee, force) (_, contract) (_, delegate) cctxt ->
+      begin fun fee (_, contract) (_, delegate) cctxt ->
         source_to_keys cctxt cctxt#block contract >>=? fun (src_pk, manager_sk) ->
         set_delegate ~fee cctxt cctxt#block contract (Some delegate) ~src_pk ~manager_sk >>=? fun oph ->
-        operation_submitted_message cctxt ~force oph
+        operation_submitted_message cctxt oph
       end ;
 
     command ~group ~desc:"open a new account"
@@ -153,7 +153,6 @@ let commands () =
           ~fee
           ?delegate
           ~delegatable
-          ~force
           ~manager_pkh
           ~balance
           ~source
@@ -163,7 +162,7 @@ let commands () =
           cctxt
           () >>=? fun (oph, contract) ->
         save_contract ~force cctxt alias_name contract >>=? fun () ->
-        operation_submitted_message ~force ~contracts:[ contract ] cctxt oph
+        operation_submitted_message ~contracts:[ contract ] cctxt oph
       end ;
 
     command ~group ~desc: "Launch a smart contract on the blockchain"
@@ -193,14 +192,14 @@ let commands () =
         Lwt.return (Micheline_parser.no_parsing_error program) >>=? fun { expanded = code } ->
         source_to_keys cctxt cctxt#block source >>=? fun (src_pk, src_sk) ->
         get_pkh cctxt delegate >>=? fun delegate ->
-        originate_contract ~fee ~delegate ~force ~delegatable ~spendable ~initial_storage
+        originate_contract ~fee ~delegate ~delegatable ~spendable ~initial_storage
           ~manager ~balance ~source ~src_pk ~src_sk ~code cctxt >>= fun errors ->
         report_michelson_errors ~no_print_source ~msg:"origination simulation failed" cctxt errors >>= function
         | None -> return ()
         | Some (oph, contract) ->
             save_contract ~force cctxt alias_name contract >>=? fun () ->
             operation_submitted_message cctxt
-              ~force ~contracts:[contract] oph
+              ~contracts:[contract] oph
       end ;
 
     command ~group ~desc: "open a new (free) account"
@@ -214,14 +213,14 @@ let commands () =
        @@ stop)
       begin fun force alias_name (_, manager_pkh) cctxt ->
         RawContractAlias.of_fresh cctxt force alias_name >>=? fun alias_name ->
-        faucet ~force ~manager_pkh cctxt#block cctxt () >>=? fun (oph, contract) ->
+        faucet ~manager_pkh cctxt#block cctxt () >>=? fun (oph, contract) ->
         operation_submitted_message cctxt
-          ~force ~contracts:[contract] oph >>=? fun () ->
+          ~contracts:[contract] oph >>=? fun () ->
         save_contract ~force cctxt alias_name contract
       end;
 
     command ~group ~desc: "transfer tokens"
-      (args4 fee_arg arg_arg force_switch no_print_source_flag)
+      (args3 fee_arg arg_arg no_print_source_flag)
       (prefixes [ "transfer" ]
        @@ tez_param
          ~name: "qty" ~desc: "amount taken from source"
@@ -232,18 +231,18 @@ let commands () =
        @@ ContractAlias.destination_param
          ~name: "dst" ~desc: "name/literal of the destination contract"
        @@ stop)
-      begin fun (fee, arg, force, no_print_source) amount (_, source) (_, destination) cctxt ->
+      begin fun (fee, arg, no_print_source) amount (_, source) (_, destination) cctxt ->
         source_to_keys cctxt cctxt#block source >>=? fun (src_pk, src_sk) ->
-        transfer ~force cctxt ~fee cctxt#block
+        transfer cctxt ~fee cctxt#block
           ~source ~src_pk ~src_sk ~destination ~arg ~amount () >>=
         report_michelson_errors ~no_print_source ~msg:"transfer simulation failed" cctxt >>= function
         | None -> return ()
         | Some (oph, contracts) ->
-            operation_submitted_message cctxt ~force ~contracts oph 
+            operation_submitted_message cctxt ~contracts oph
       end;
 
     command ~desc: "Activate a protocol"
-      (args1 force_switch)
+      no_options
       (prefixes [ "activate" ; "protocol" ]
        @@ Protocol_hash.param ~name:"version"
          ~desc:"Protocol version (b58check)"
@@ -251,14 +250,14 @@ let commands () =
        @@ Environment.Ed25519.Secret_key.param
          ~name:"password" ~desc:"Dictator's key"
        @@ stop)
-      begin fun force hash seckey cctxt ->
+      begin fun () hash seckey cctxt ->
         dictate cctxt cctxt#block
           (Activate hash) seckey >>=? fun oph ->
-        operation_submitted_message cctxt ~force:force oph
+        operation_submitted_message cctxt oph
       end ;
 
     command ~desc: "Fork a test protocol"
-      (args1 force_switch)
+      no_options
       (prefixes [ "fork" ; "test" ; "protocol" ]
        @@ Protocol_hash.param ~name:"version"
          ~desc:"Protocol version (b58check)"
@@ -266,10 +265,10 @@ let commands () =
        @@ Environment.Ed25519.Secret_key.param
          ~name:"password" ~desc:"Dictator's key"
        @@ stop)
-      begin fun force hash seckey cctxt ->
+      begin fun () hash seckey cctxt ->
         dictate cctxt cctxt#block
           (Activate_testnet hash) seckey >>=? fun oph ->
-        operation_submitted_message cctxt ~force:force oph
+        operation_submitted_message cctxt oph
       end ;
 
   ]
diff --git a/src/lib_node_services/node_rpc_services.ml b/src/lib_node_services/node_rpc_services.ml
index 08cf4cfb2..b829ef70b 100644
--- a/src/lib_node_services/node_rpc_services.ml
+++ b/src/lib_node_services/node_rpc_services.ml
@@ -758,7 +758,7 @@ let inject_operation =
        prevalidation context."
     ~query: RPC_query.empty
     ~input:
-      (obj4
+      (obj3
          (req "signedOperationContents"
             (describe ~title: "Tezos signed operation (hex encoded)"
                bytes))
@@ -769,13 +769,7 @@ let inject_operation =
                   (pre-)validated before answering. (default: true)"
                bool)
             true)
-         (opt "net_id" Net_id.encoding)
-         (opt "force"
-            (describe
-               ~description:
-                 "Should we inject operation that are \"branch_refused\" \
-                  or \"branch_delayed\". (default: false)"
-               bool)))
+         (opt "net_id" Net_id.encoding))
     ~output:
       (Error.wrap @@
        describe
diff --git a/src/lib_node_services/node_rpc_services.mli b/src/lib_node_services/node_rpc_services.mli
index 344feaf33..5d9ec17ba 100644
--- a/src/lib_node_services/node_rpc_services.mli
+++ b/src/lib_node_services/node_rpc_services.mli
@@ -267,7 +267,7 @@ val inject_block:
 
 val inject_operation:
   ([ `POST ], unit,
-   unit, unit, (MBytes.t * bool * Net_id.t option * bool option),
+   unit, unit, (MBytes.t * bool * Net_id.t option),
    Operation_hash.t tzresult, unit) RPC_service.t
 
 val inject_protocol:
diff --git a/src/lib_node_shell/node.ml b/src/lib_node_shell/node.ml
index e179ad7de..3277b009a 100644
--- a/src/lib_node_shell/node.ml
+++ b/src/lib_node_shell/node.ml
@@ -10,12 +10,12 @@
 open Lwt.Infix
 open Logging.Node.Worker
 
-let inject_operation validator ?force ?net_id bytes =
+let inject_operation validator ?net_id bytes =
   let t =
     match Data_encoding.Binary.of_bytes Operation.encoding bytes with
     | None -> failwith "Can't parse the operation"
     | Some op ->
-        Validator.inject_operation validator ?force ?net_id op
+        Validator.inject_operation validator ?net_id op
   in
   let hash = Operation_hash.hash_bytes [bytes] in
   Lwt.return (hash, t)
@@ -56,7 +56,7 @@ type t = {
     MBytes.t -> Operation.t list list ->
     (Block_hash.t * unit tzresult Lwt.t) tzresult Lwt.t ;
   inject_operation:
-    ?force:bool -> ?net_id:Net_id.t -> MBytes.t ->
+    ?net_id:Net_id.t -> MBytes.t ->
     (Operation_hash.t * unit tzresult Lwt.t) Lwt.t ;
   inject_protocol:
     ?force:bool -> Protocol.t ->
diff --git a/src/lib_node_shell/node.mli b/src/lib_node_shell/node.mli
index ab8502b71..61ff401dc 100644
--- a/src/lib_node_shell/node.mli
+++ b/src/lib_node_shell/node.mli
@@ -44,7 +44,7 @@ module RPC : sig
       non strictly increasing fitness. *)
 
   val inject_operation:
-    t -> ?force:bool -> ?net_id:Net_id.t -> MBytes.t ->
+    t -> ?net_id:Net_id.t -> MBytes.t ->
     (Operation_hash.t * unit tzresult Lwt.t) Lwt.t
   val inject_protocol:
     t -> ?force:bool -> Protocol.t ->
diff --git a/src/lib_node_shell/node_rpc.ml b/src/lib_node_shell/node_rpc.ml
index 4ec508a79..522285ecf 100644
--- a/src/lib_node_shell/node_rpc.ml
+++ b/src/lib_node_shell/node_rpc.ml
@@ -420,9 +420,9 @@ let build_rpc_directory node =
       end >>= RPC_answer.return in
     RPC_directory.register0 dir Services.inject_block implementation in
   let dir =
-    let implementation () (contents, blocking, net_id, force) =
+    let implementation () (contents, blocking, net_id) =
       Node.RPC.inject_operation
-        node ?force ?net_id contents >>= fun (hash, wait) ->
+        node ?net_id contents >>= fun (hash, wait) ->
       begin
         (if blocking then wait else return ()) >>=? fun () -> return hash
       end >>= RPC_answer.return in
diff --git a/src/lib_node_shell/validator.ml b/src/lib_node_shell/validator.ml
index 9895782b9..588e8cc70 100644
--- a/src/lib_node_shell/validator.ml
+++ b/src/lib_node_shell/validator.ml
@@ -114,7 +114,7 @@ let shutdown { active_nets ; block_validator } =
 let watcher { valid_block_input } =
   Lwt_watcher.create_stream valid_block_input
 
-let inject_operation v ?(force = false) ?net_id op =
+let inject_operation v ?net_id op =
   begin
     match net_id with
     | None -> begin
@@ -127,17 +127,14 @@ let inject_operation v ?(force = false) ?net_id op =
       end
     | Some net_id ->
         get v net_id >>=? fun nv ->
-        if force then
-          return nv
-        else
-          Distributed_db.Block_header.known
-            (Net_validator.net_db nv)
-            op.shell.branch >>= function
-          | true ->
-              return nv
-          | false ->
-              failwith "Unknown branch (%a), cannot inject the operation."
-                Block_hash.pp_short op.shell.branch
+        Distributed_db.Block_header.known
+          (Net_validator.net_db nv)
+          op.shell.branch >>= function
+        | true ->
+            return nv
+        | false ->
+            failwith "Unknown branch (%a), cannot inject the operation."
+              Block_hash.pp_short op.shell.branch
   end >>=? fun nv ->
   let pv = Net_validator.prevalidator nv in
-  Prevalidator.inject_operation pv ~force op
+  Prevalidator.inject_operation pv op
diff --git a/src/lib_node_shell/validator.mli b/src/lib_node_shell/validator.mli
index 94dadb304..04d71bbfa 100644
--- a/src/lib_node_shell/validator.mli
+++ b/src/lib_node_shell/validator.mli
@@ -39,6 +39,5 @@ val watcher: t -> State.Block.t Lwt_stream.t * Lwt_watcher.stopper
 
 val inject_operation:
   t ->
-  ?force:bool ->
   ?net_id:Net_id.t ->
   Operation.t -> unit tzresult Lwt.t