cURL
curl --request POST \ --url https://app.coverwhale.com/api/v1/submission/{displayId}/cancel-request \ --header 'AccessToken: <api-key>' \ --header 'Content-Type: application/json' \ --data ' { "effective_date_transaction": "03/01/2026", "effective_date_transaction_al": "03/01/2026" } '
{ "status": "success", "submission_number": "<string>", "transaction_id": 123, "cancellation_status": "<string>" }
Creates a cancellation endorsement (first step of the cancellation workflow).
AWS Cognito access token obtained from the /authentication endpoint. Token expires after 3600 seconds.
Submission display ID
Cancellation effective date (MM/DD/YYYY)
"03/01/2026"
Optional separate AL cancellation date (MM/DD/YYYY)
Cancellation request created
"success"