A: Forte uses NACHA specification return codes that indicate whether the consumer portion of the payment has been returned or rejected. Some common returns are a closed bank account, an invalid bank account, insufficient funds, or a dispute. If a payment is unsuccessful, CSG Forte usually receives the return message from the ACH network within 2 to 4 business days of payment submission. For more information on return codes, please refer to the latest NACHA guide which can be found at http://www.nacha.org (subscription required).
Transaction Return codes can be found here: http://www.forte.net/devdocs/reference/response_codes.htm