Check Guarantee for ACH Check Transactions via Merchant Partners
Check Guarantee is the most commonly used check service, allowing the merchant to "insure" the face value of the check, and protecting the merchant against checks written on non-sufficient funds (NSF). Merchants obtain electronic approval or voice authorization for the transaction, and then deposit the checks.
Checks that do not clear can be submitted for reimbursement. This reimbursement takes 30 days from the time of receipt of the original item, and is processed electronically via the ACH. It is sent under a specific category, so the merchant can identify that the credit is for a bounced item.