diff --git a/object/service.proto b/object/service.proto
index c7a292b..80f9955 100644
--- a/object/service.proto
+++ b/object/service.proto
@@ -721,10 +721,21 @@ message ReplicateRequest {
 
   // Signature of `object.object_id.value` field.
   neo.fs.v2.refs.Signature signature = 2;
+
+  // Optional flag that requires server side to attach signature of just
+  // replicated object to ensure it has been received correctly. Signature
+  // must be calculated with an exposed to network map public key that
+  // corresponds to the object receiver.
+  bool sign_object = 3;
 }
 
 // Replicate RPC response
 message ReplicateResponse {
   // Operation execution status with one of the enumerated codes.
   neo.fs.v2.status.Status status = 1;
+
+  // Deterministic ECDSA with SHA-256 hashing (RFC 6979) signature of
+  // replicated object. Must be attached if request was made with
+  // `sign_object` flag set.
+  bytes object_signature = 2;
 }
diff --git a/proto-docs/object.md b/proto-docs/object.md
index a20791b..6c0f9db 100644
--- a/proto-docs/object.md
+++ b/proto-docs/object.md
@@ -721,6 +721,7 @@ Replicate RPC request
 | ----- | ---- | ----- | ----------- |
 | object | [Object](#neo.fs.v2.object.Object) |  | Object to be replicated. |
 | signature | [neo.fs.v2.refs.Signature](#neo.fs.v2.refs.Signature) |  | Signature of `object.object_id.value` field. |
+| sign_object | [bool](#bool) |  | Optional flag that requires server side to attach signature of just replicated object to ensure it has been received correctly. Signature must be calculated with an exposed to network map public key that corresponds to the object receiver. |
 
 
 <a name="neo.fs.v2.object.ReplicateResponse"></a>
@@ -732,6 +733,7 @@ Replicate RPC response
 | Field | Type | Label | Description |
 | ----- | ---- | ----- | ----------- |
 | status | [neo.fs.v2.status.Status](#neo.fs.v2.status.Status) |  | Operation execution status with one of the enumerated codes. |
+| object_signature | [bytes](#bytes) |  | Deterministic ECDSA with SHA-256 hashing (RFC 6979) signature of replicated object. Must be attached if request was made with `sign_object` flag set. |
 
 
 <a name="neo.fs.v2.object.SearchRequest"></a>