diff --git a/api/layer/object.go b/api/layer/object.go
index 5fad1d14..551380ee 100644
--- a/api/layer/object.go
+++ b/api/layer/object.go
@@ -189,17 +189,15 @@ func (n *layer) PutObject(ctx context.Context, p *PutObjectParams) (*data.Object
 		prm.Attributes = append(prm.Attributes, [2]string{k, v})
 	}
 
-	n.prepareAuthParameters(ctx, &prm.PrmAuth)
-
 	if p.Header[VersionsDeleteMarkAttr] == DelMarkFullObject {
 		if last := versions.getLast(); last != nil {
 			n.objCache.Delete(last.Address())
 		}
 	}
 
-	id, err := n.neoFS.CreateObject(ctx, prm)
+	id, err := n.objectPut(ctx, prm)
 	if err != nil {
-		return nil, n.transformNeofsError(ctx, err)
+		return nil, err
 	}
 
 	if p.Lock != nil {
@@ -451,6 +449,14 @@ func (n *layer) objectDelete(ctx context.Context, idCnr *cid.ID, idObj *oid.ID)
 	return n.transformNeofsError(ctx, n.neoFS.DeleteObject(ctx, prm))
 }
 
+// objectPut prepare auth parameters and invoke neofs.CreateObject.
+func (n *layer) objectPut(ctx context.Context, prm neofs.PrmObjectCreate) (*oid.ID, error) {
+	n.prepareAuthParameters(ctx, &prm.PrmAuth)
+
+	id, err := n.neoFS.CreateObject(ctx, prm)
+	return id, n.transformNeofsError(ctx, err)
+}
+
 // ListObjectsV1 returns objects in a bucket for requests of Version 1.
 func (n *layer) ListObjectsV1(ctx context.Context, p *ListObjectsParamsV1) (*ListObjectsInfoV1, error) {
 	var (
diff --git a/api/layer/system_object.go b/api/layer/system_object.go
index 0008955c..3df98317 100644
--- a/api/layer/system_object.go
+++ b/api/layer/system_object.go
@@ -117,9 +117,9 @@ func (n *layer) putSystemObjectIntoNeoFS(ctx context.Context, p *PutSystemObject
 		prm.Attributes = append(prm.Attributes, [2]string{k, v})
 	}
 
-	id, err := n.neoFS.CreateObject(ctx, prm)
+	id, err := n.objectPut(ctx, prm)
 	if err != nil {
-		return nil, n.transformNeofsError(ctx, err)
+		return nil, err
 	}
 
 	meta, err := n.objectHead(ctx, p.BktInfo.CID, id)