diff --git a/core/src/main/java/haveno/core/trade/protocol/tasks/SendDepositsConfirmedMessage.java b/core/src/main/java/haveno/core/trade/protocol/tasks/SendDepositsConfirmedMessage.java
index 5fb80339..02b9200f 100644
--- a/core/src/main/java/haveno/core/trade/protocol/tasks/SendDepositsConfirmedMessage.java
+++ b/core/src/main/java/haveno/core/trade/protocol/tasks/SendDepositsConfirmedMessage.java
@@ -54,7 +54,7 @@ public abstract class SendDepositsConfirmedMessage extends SendMailboxMessageTas
 
             // skip if already acked by receiver
             if (ackedByReceiver()) {
-                complete();
+                if (!isCompleted()) complete();
                 return;
             }