diff --git a/apps/onboarding-functions/src/main/java/it/pagopa/selfcare/onboarding/workflow/WorkflowExecutorContractRegistrationAggregator.java b/apps/onboarding-functions/src/main/java/it/pagopa/selfcare/onboarding/workflow/WorkflowExecutorContractRegistrationAggregator.java
index 5f6fd77de..0ff4ce4a9 100644
--- a/apps/onboarding-functions/src/main/java/it/pagopa/selfcare/onboarding/workflow/WorkflowExecutorContractRegistrationAggregator.java
+++ b/apps/onboarding-functions/src/main/java/it/pagopa/selfcare/onboarding/workflow/WorkflowExecutorContractRegistrationAggregator.java
@@ -24,11 +24,10 @@ public record WorkflowExecutorContractRegistrationAggregator(ObjectMapper object
 
     @Override
     public Optional<OnboardingStatus> executeRequestState(TaskOrchestrationContext ctx, OnboardingWorkflow onboardingWorkflow) {
-        String onboardingString = getOnboardingString(objectMapper, onboardingWorkflow.getOnboarding());
         String onboardingWorkflowString = getOnboardingWorkflowString(objectMapper, onboardingWorkflow);
         ctx.callActivity(BUILD_CONTRACT_ACTIVITY_NAME, getOnboardingWorkflowString(objectMapper, onboardingWorkflow), optionsRetry, String.class).await();
         ctx.callActivity(SAVE_TOKEN_WITH_CONTRACT_ACTIVITY_NAME, onboardingWorkflowString, optionsRetry, String.class).await();
-        ctx.callActivity(SEND_MAIL_REGISTRATION_FOR_CONTRACT, onboardingString, optionsRetry, String.class).await();
+        ctx.callActivity(SEND_MAIL_REGISTRATION_FOR_CONTRACT, onboardingWorkflowString, optionsRetry, String.class).await();
         return Optional.of(OnboardingStatus.PENDING);
     }