diff --git a/akka-persistence/src/main/java/akka/persistence/journal/japi/AsyncWritePlugin.java b/akka-persistence/src/main/java/akka/persistence/journal/japi/AsyncWritePlugin.java
index 638656ccb1..5dc163785b 100644
--- a/akka-persistence/src/main/java/akka/persistence/journal/japi/AsyncWritePlugin.java
+++ b/akka-persistence/src/main/java/akka/persistence/journal/japi/AsyncWritePlugin.java
@@ -20,15 +20,19 @@ interface AsyncWritePlugin {
     /**
      * Java API, Plugin API: synchronously writes a batch of delivery confirmations to
      * the journal.
+     * 
+     * @deprecated doAsyncWriteConfirmations will be removed, since Channels will be removed (since 2.3.4)
      */
-    Future<Void> doAsyncWriteConfirmations(Iterable<PersistentConfirmation> confirmations);
+    @Deprecated Future<Void> doAsyncWriteConfirmations(Iterable<PersistentConfirmation> confirmations);
 
     /**
      * Java API, Plugin API: synchronously deletes messages identified by `messageIds`
      * from the journal. If `permanent` is set to `false`, the persistent messages are
      * marked as deleted, otherwise they are permanently deleted.
+     * 
+     * @deprecated doAsyncDeleteMessages will be removed (since 2.3.4)
      */
-    Future<Void> doAsyncDeleteMessages(Iterable<PersistenceId> messageIds, boolean permanent);
+    @Deprecated Future<Void> doAsyncDeleteMessages(Iterable<PersistenceId> messageIds, boolean permanent);
 
     /**
      * Java API, Plugin API: synchronously deletes all persistent messages up to
diff --git a/akka-persistence/src/main/java/akka/persistence/journal/japi/SyncWritePlugin.java b/akka-persistence/src/main/java/akka/persistence/journal/japi/SyncWritePlugin.java
index 86600827df..610fadfa61 100644
--- a/akka-persistence/src/main/java/akka/persistence/journal/japi/SyncWritePlugin.java
+++ b/akka-persistence/src/main/java/akka/persistence/journal/japi/SyncWritePlugin.java
@@ -18,15 +18,19 @@ interface SyncWritePlugin {
     /**
      * Java API, Plugin API: synchronously writes a batch of delivery confirmations to
      * the journal.
+     * 
+     * @deprecated doWriteConfirmations will be removed, since Channels will be removed (since 2.3.4)
      */
-    void doWriteConfirmations(Iterable<PersistentConfirmation> confirmations);
+    @Deprecated void doWriteConfirmations(Iterable<PersistentConfirmation> confirmations);
 
     /**
      * Java API, Plugin API: synchronously deletes messages identified by `messageIds`
      * from the journal. If `permanent` is set to `false`, the persistent messages are
      * marked as deleted, otherwise they are permanently deleted.
+     * 
+     * @deprecated doDeleteMessages will be removed (since 2.3.4)
      */
-    void doDeleteMessages(Iterable<PersistenceId> messageIds, boolean permanent);
+    @Deprecated void doDeleteMessages(Iterable<PersistenceId> messageIds, boolean permanent);
 
     /**
      * Java API, Plugin API: synchronously deletes all persistent messages up to
diff --git a/akka-persistence/src/main/scala/akka/persistence/journal/AsyncWriteJournal.scala b/akka-persistence/src/main/scala/akka/persistence/journal/AsyncWriteJournal.scala
index a90d95d846..1af1f96046 100644
--- a/akka-persistence/src/main/scala/akka/persistence/journal/AsyncWriteJournal.scala
+++ b/akka-persistence/src/main/scala/akka/persistence/journal/AsyncWriteJournal.scala
@@ -96,6 +96,7 @@ trait AsyncWriteJournal extends Actor with WriteJournalBase with AsyncRecovery {
   /**
    * Plugin API: asynchronously writes a batch of delivery confirmations to the journal.
    */
+  @deprecated("writeConfirmations will be removed, since Channels will be removed.", since = "2.3.4")
   def asyncWriteConfirmations(confirmations: immutable.Seq[PersistentConfirmation]): Future[Unit]
 
   /**
@@ -103,6 +104,7 @@ trait AsyncWriteJournal extends Actor with WriteJournalBase with AsyncRecovery {
    * journal. If `permanent` is set to `false`, the persistent messages are marked as
    * deleted, otherwise they are permanently deleted.
    */
+  @deprecated("asyncDeleteMessages will be removed.", since = "2.3.4")
   def asyncDeleteMessages(messageIds: immutable.Seq[PersistenceId], permanent: Boolean): Future[Unit]
 
   /**
diff --git a/akka-persistence/src/main/scala/akka/persistence/journal/SyncWriteJournal.scala b/akka-persistence/src/main/scala/akka/persistence/journal/SyncWriteJournal.scala
index e940ffae8a..8d82483a68 100644
--- a/akka-persistence/src/main/scala/akka/persistence/journal/SyncWriteJournal.scala
+++ b/akka-persistence/src/main/scala/akka/persistence/journal/SyncWriteJournal.scala
@@ -88,6 +88,7 @@ trait SyncWriteJournal extends Actor with WriteJournalBase with AsyncRecovery {
   /**
    * Plugin API: synchronously writes a batch of delivery confirmations to the journal.
    */
+  @deprecated("writeConfirmations will be removed, since Channels will be removed.", since = "2.3.4")
   def writeConfirmations(confirmations: immutable.Seq[PersistentConfirmation]): Unit
 
   /**
@@ -95,6 +96,7 @@ trait SyncWriteJournal extends Actor with WriteJournalBase with AsyncRecovery {
    * journal. If `permanent` is set to `false`, the persistent messages are marked as
    * deleted, otherwise they are permanently deleted.
    */
+  @deprecated("deleteMessages will be removed.", since = "2.3.4")
   def deleteMessages(messageIds: immutable.Seq[PersistenceId], permanent: Boolean): Unit
 
   /**