diff --git a/spi/registration-service-spi/src/main/java/org/eclipse/edc/registration/spi/model/Participant.java b/spi/registration-service-spi/src/main/java/org/eclipse/edc/registration/spi/model/Participant.java
index 6b597984..4d3506fb 100644
--- a/spi/registration-service-spi/src/main/java/org/eclipse/edc/registration/spi/model/Participant.java
+++ b/spi/registration-service-spi/src/main/java/org/eclipse/edc/registration/spi/model/Participant.java
@@ -59,6 +59,11 @@ public Participant copy() {
         return copy(builder);
     }
 
+    @Override
+    public String stateAsString() {
+        return ParticipantStatus.from(state).name();
+    }
+
     public void transitionAuthorizing() {
         transition(AUTHORIZING, ONBOARDING_INITIATED);
     }