Checking for Duplicate Tenders/Payments
-- EXT_REFERENCE_ID, ACCOUNT_ID and TENDER_TYPE will be a unique combination inside CC&B
Thus, if someone tries to create a tener type (via UI or back-end calls), the payment event would fail if EXT_REFERENCE_ID, ACCOUNT_ID and TENDER_TYPE combination is not unique.
Has anyone implement similar solution(s) or provide a way to make sure that EXT_REFERENCE_ID, ACCOUNT_ID and TENDER_TYPE combination is unique in CC&B?