diff --git a/core/src/main/java/haveno/core/support/dispute/DisputeSummaryVerification.java b/core/src/main/java/haveno/core/support/dispute/DisputeSummaryVerification.java
index 3206ec48..6e2c7b3b 100644
--- a/core/src/main/java/haveno/core/support/dispute/DisputeSummaryVerification.java
+++ b/core/src/main/java/haveno/core/support/dispute/DisputeSummaryVerification.java
@@ -18,6 +18,7 @@
 package haveno.core.support.dispute;
 
 import haveno.common.crypto.Hash;
+import haveno.common.crypto.PubKeyRing;
 import haveno.common.util.Utilities;
 import haveno.core.locale.Res;
 import haveno.core.support.dispute.agent.DisputeAgent;
@@ -59,20 +60,35 @@ public class DisputeSummaryVerification {
     }
 
     public static void verifySignature(String input,
-                                         ArbitratorManager arbitratorMediator) {
+                                         ArbitratorManager arbitratorManager) {
+        // get dispute agent
+        DisputeAgent disputeAgent = null;
         try {
             String[] parts = input.split(SEPARATOR1);
             String textToSign = parts[0];
             String fullAddress = textToSign.split("\n")[1].split(": ")[1];
             NodeAddress nodeAddress = new NodeAddress(fullAddress);
-            DisputeAgent disputeAgent = arbitratorMediator.getDisputeAgentByNodeAddress(nodeAddress).orElse(null);
+            disputeAgent = arbitratorManager.getDisputeAgentByNodeAddress(nodeAddress).orElse(null);
             checkNotNull(disputeAgent, "Dispute agent is null");
+        } catch (Throwable e) {
+            e.printStackTrace();
+            throw new IllegalArgumentException(Res.get("support.sigCheck.popup.invalidFormat"));
+        }
 
+        // verify signature with pub key ring
+        verifySignature(input, disputeAgent.getPubKeyRing());
+    }
+
+    public static void verifySignature(String input,
+                                         PubKeyRing agentPubKeyRing) {
+        try {
+            String[] parts = input.split(SEPARATOR1);
+            String textToSign = parts[0];
             String sigString = parts[1].split(SEPARATOR2)[0];
             byte[] sig = Utilities.decodeFromHex(sigString);
             byte[] hash = Hash.getSha256Hash(textToSign);
             try {
-                HavenoUtils.verifySignature(disputeAgent.getPubKeyRing(), hash, sig);
+                HavenoUtils.verifySignature(agentPubKeyRing, hash, sig);
             } catch (Exception e) {
                 throw new IllegalArgumentException(Res.get("support.sigCheck.popup.failed"));
             }
diff --git a/core/src/main/java/haveno/core/support/dispute/arbitration/ArbitrationManager.java b/core/src/main/java/haveno/core/support/dispute/arbitration/ArbitrationManager.java
index 7822ad5e..eefca010 100644
--- a/core/src/main/java/haveno/core/support/dispute/arbitration/ArbitrationManager.java
+++ b/core/src/main/java/haveno/core/support/dispute/arbitration/ArbitrationManager.java
@@ -198,14 +198,6 @@ public final class ArbitrationManager extends DisputeManager<ArbitrationDisputeL
 
                 log.info("Processing {} for {} {}", disputeClosedMessage.getClass().getSimpleName(), trade.getClass().getSimpleName(), disputeResult.getTradeId());
 
-                // verify arbitrator signature
-                String summaryText = chatMessage.getMessage();
-                DisputeSummaryVerification.verifySignature(summaryText, arbitratorManager);
-
-                // save dispute closed message for reprocessing
-                trade.getProcessModel().setDisputeClosedMessage(disputeClosedMessage);
-                requestPersistence();
-
                 // get dispute
                 Optional<Dispute> disputeOptional = findDispute(disputeResult);
                 String uid = disputeClosedMessage.getUid();
@@ -225,7 +217,16 @@ public final class ArbitrationManager extends DisputeManager<ArbitrationDisputeL
                 }
                 dispute = disputeOptional.get();
 
-                // verify that arbitrator does not get DisputeClosedMessage
+                // verify arbitrator signature
+                String summaryText = chatMessage.getMessage();
+                if (dispute != null) DisputeSummaryVerification.verifySignature(summaryText, dispute.getAgentPubKeyRing()); // use dispute's arbitrator pub key ring
+                else DisputeSummaryVerification.verifySignature(summaryText, arbitratorManager); // verify using registered arbitrator (will fail is arbitrator is unregistered)
+
+                // save dispute closed message for reprocessing
+                trade.getProcessModel().setDisputeClosedMessage(disputeClosedMessage);
+                requestPersistence();
+
+                // verify arbitrator does not receive DisputeClosedMessage
                 if (keyRing.getPubKeyRing().equals(dispute.getAgentPubKeyRing())) {
                     log.error("Arbitrator received disputeResultMessage. That should never happen.");
                     trade.getProcessModel().setDisputeClosedMessage(null); // don't reprocess