Why are there duplicate transactions in a lockbox?

Transaction numbers are only required to be unique within a transaction source. A customer can have duplicate transaction numbers as long as they belong to different transaction sources. However, lockbox can't automatically apply a payment to these transactions.

If a customer has more than one transaction with the same number within a lockbox transmission, then lockbox can't determine to which transaction to apply the payment. The receipt is left in one of these statuses:

• Unapplied: If the customer account number or MICR number is provided.

• Unidentified: If the customer account number or MICR number isn't provided, and there are no successful matching recommendations.

You must apply receipts to these transactions manually.