diff --git a/PrivaPub.Tests/Http/MastodonStatusesTests.cs b/PrivaPub.Tests/Http/MastodonStatusesTests.cs
index 85b822b..3dc81b3 100644
--- a/PrivaPub.Tests/Http/MastodonStatusesTests.cs
+++ b/PrivaPub.Tests/Http/MastodonStatusesTests.cs
@@ -163,6 +163,24 @@ namespace PrivaPub.Tests.Http
 			Assert.Equal(post.ID, status.Text("id"));
 		}
 
+		// a reader who deletes the @name decePub prefills still answers its author: GoToSocial dropped such a reply, addressed
+		// to nobody there (found by decePub's e2e tests on the town)
+		[Fact]
+		public async Task A_reply_without_the_authors_name_still_names_the_author_in_cc()
+		{
+			var since = DateTime.UtcNow.AddSeconds(-1);
+			var alice = await _host.Mastodon("alice");
+			var bob = new RemoteActor(_peer, "bob");
+			_peer.WebFinger(bob);
+			var parent = await _host.PublicPostFrom(bob, alice);
+
+			var reply = await alice.Status("no name in this one", ("in_reply_to_id", parent.ID));
+
+			Assert.Empty(reply["mentions"]!.AsArray());
+			var create = Assert.Single(await bob.Delivered(since), d => d.Type() == "Create");
+			Assert.Contains(bob.Id, Strings(create["object"]!["cc"]));
+		}
+
 		[Fact]
 		public async Task A_poll_is_created_validated_and_federated_as_a_question()
 		{
diff --git a/PrivaPub/Domain/Statuses/StatusService.cs b/PrivaPub/Domain/Statuses/StatusService.cs
index 4269977..5ac9e17 100644
--- a/PrivaPub/Domain/Statuses/StatusService.cs
+++ b/PrivaPub/Domain/Statuses/StatusService.cs
@@ -198,6 +198,7 @@ namespace PrivaPub.Domain.Statuses
 				AnsweringToPostId = parent?.ID,
 				InReplyToURI = parent?.ObjectURI ?? (IsRemoteUri(draft.InReplyTo) ? draft.InReplyTo : default),
 				InReplyToAccountId = parent?.AuthorAccountId ?? parent?.GroupUserId,
+				InReplyToActorURI = parent is { IsFederatedCopy: true } ? parent.ActorURI : default,
 				IsLocalOnly = isLocalOnly,
 				ActorURI = author.Uri,
 				Poll = draft.Poll == default ? default : _polls.Create(draft.Poll),
diff --git a/PrivaPub/Federation/Rendering/ActivityPubRenderer.cs b/PrivaPub/Federation/Rendering/ActivityPubRenderer.cs
index a799efb..098a614 100644
--- a/PrivaPub/Federation/Rendering/ActivityPubRenderer.cs
+++ b/PrivaPub/Federation/Rendering/ActivityPubRenderer.cs
@@ -146,6 +146,11 @@ namespace PrivaPub.Federation.Rendering
 			};
 			if (group is { IsCircle: false })
 				cc.Add(group.Uri);
+			// a public reply names the author it answers in cc even when the @name was deleted from its text, as Pleroma does:
+			// GoToSocial keeps only what is addressed to someone there, and the reply already says whom it answers
+			if (post.Visibility is PostVisibility.Public or PostVisibility.Unlisted && !string.IsNullOrEmpty(post.InReplyToActorURI)
+				&& !mentions.Any(m => m.GetValue<string>() == post.InReplyToActorURI))
+				cc.Add(post.InReplyToActorURI);
 
 			var note = NoteBody(post, author, to, cc, inReplyTo);
 			if (group != default)
diff --git a/PrivaPub/Models/Post/Post.cs b/PrivaPub/Models/Post/Post.cs
index 4b9a598..05710dc 100644
--- a/PrivaPub/Models/Post/Post.cs
+++ b/PrivaPub/Models/Post/Post.cs
@@ -10,6 +10,7 @@ namespace PrivaPub.Models.Post
 		public string AnsweringToPostId { get; set; }//the parent's Post.ID when we hold it
 		public string InReplyToURI { get; set; }
 		public string InReplyToAccountId { get; set; }
+		public string InReplyToActorURI { get; set; }//a local reply's remote parent author, named in its cc
 		public string GroupId { get; set; }
 		public string ConversationId { get; set; }//DmGroup.ID of a direct post
 		public string AudienceURI { get; set; }//a remote community the post was made in