diff --git a/pkg/services/object/put/v2/streamer.go b/pkg/services/object/put/v2/streamer.go
index a1e1103b9..ec1d263dd 100644
--- a/pkg/services/object/put/v2/streamer.go
+++ b/pkg/services/object/put/v2/streamer.go
@@ -1,7 +1,6 @@
 package putsvc
 
 import (
-	"errors"
 	"fmt"
 
 	"github.com/nspcc-dev/neofs-api-go/v2/object"
@@ -31,15 +30,6 @@ type sizes struct {
 	writtenPayload uint64 // sum size of already cached chunks
 }
 
-// TODO: errors are copy-pasted from putsvc package
-//  consider replacing to core library
-
-// errors related to invalid payload size
-var (
-	errExceedingMaxSize = errors.New("payload size is greater than the limit")
-	errWrongPayloadSize = errors.New("wrong payload size")
-)
-
 func (s *streamer) Send(req *object.PutRequest) (err error) {
 	switch v := req.GetBody().GetObjectPart().(type) {
 	case *object.PutObjectPartInit:
@@ -64,7 +54,7 @@ func (s *streamer) Send(req *object.PutRequest) (err error) {
 
 			// check payload size limit overflow
 			if s.payloadSz > maxSz {
-				return errExceedingMaxSize
+				return putsvc.ErrExceedingMaxSize
 			}
 
 			s.init = req
@@ -75,7 +65,7 @@ func (s *streamer) Send(req *object.PutRequest) (err error) {
 
 			// check payload size overflow
 			if s.writtenPayload > s.payloadSz {
-				return errWrongPayloadSize
+				return putsvc.ErrWrongPayloadSize
 			}
 		}
 
@@ -115,7 +105,7 @@ func (s *streamer) CloseAndRecv() (*object.PutResponse, error) {
 	if s.saveChunks {
 		// check payload size correctness
 		if s.writtenPayload != s.payloadSz {
-			return nil, errWrongPayloadSize
+			return nil, putsvc.ErrWrongPayloadSize
 		}
 	}
 
diff --git a/pkg/services/object/put/validation.go b/pkg/services/object/put/validation.go
index 80067ef38..20c3bab56 100644
--- a/pkg/services/object/put/validation.go
+++ b/pkg/services/object/put/validation.go
@@ -31,8 +31,8 @@ type validatingTarget struct {
 
 // errors related to invalid payload size
 var (
-	errExceedingMaxSize = errors.New("payload size is greater than the limit")
-	errWrongPayloadSize = errors.New("wrong payload size")
+	ErrExceedingMaxSize = errors.New("payload size is greater than the limit")
+	ErrWrongPayloadSize = errors.New("wrong payload size")
 )
 
 func (t *validatingTarget) WriteHeader(obj *object.RawObject) error {
@@ -41,12 +41,12 @@ func (t *validatingTarget) WriteHeader(obj *object.RawObject) error {
 
 	// check chunk size
 	if chunkLn > t.payloadSz {
-		return errWrongPayloadSize
+		return ErrWrongPayloadSize
 	}
 
 	// check payload size limit
 	if t.payloadSz > t.maxPayloadSz {
-		return errExceedingMaxSize
+		return ErrExceedingMaxSize
 	}
 
 	cs := obj.PayloadChecksum()
@@ -84,7 +84,7 @@ func (t *validatingTarget) Write(p []byte) (n int, err error) {
 
 	// check if new chunk will overflow payload size
 	if t.writtenPayload+chunkLn > t.payloadSz {
-		return 0, errWrongPayloadSize
+		return 0, ErrWrongPayloadSize
 	}
 
 	_, err = t.hash.Write(p)
@@ -103,7 +103,7 @@ func (t *validatingTarget) Write(p []byte) (n int, err error) {
 func (t *validatingTarget) Close() (*transformer.AccessIdentifiers, error) {
 	// check payload size correctness
 	if t.payloadSz != t.writtenPayload {
-		return nil, errWrongPayloadSize
+		return nil, ErrWrongPayloadSize
 	}
 
 	if !bytes.Equal(t.hash.Sum(nil), t.checksum) {