| R | Payment card (debit or credit) |
| C | Checking |
| S | Savings |
| CCD | Corporate credit or debit |
| PPD | Prearranged payment and deposit entry |
| TEL | Telephone initiated entry |
| WEB | Internet initiayed entry |
| C21 | Check 21 |
| FF | Franchising fee |
| P | Person |
| O | Organization (Corporation) |
| DM | Direct marketing |
| EC | Ecommerce |
| VC | Visa credit card |
| VD | Visa debit card |
| MC | MasterCard credit card |
| MD | MasterCard debit card |
| DC | Discover credit card |
| DD | Discover debit card |
| AC | AmEx credit card |
| NC | Diners credit card |
| BD | Bank debit card |
| BC | Checking account |
| BS | Savings account |
| VP | Visa prepaid card |
| VS | Visa fleet card |
| MP | MasterCard prepaid card |
| MF | MasterCard fleet card |
| EF | EBT food stamp |
| EC | EBT cash benefit |
| GG | General gift card |
| FL | Fleet One card |
| GF | Fuelman or FleetWide card |
| VF | Voyager fleet card |
| WX | WEX fleet card |
| VE | Visa debit checking account |
| VV | Visa debit saving account |
| UC | UnionPay credit card |
| UD | UnionPay debit card |
| S | Sale (operation used to withdraw specific amount of money from the supplied credit card or bank account) |
| C | Credit (operation used to deposit (return) specific amount of money to the supplied credit card or bank account) |
| D | Sale decline (sale transaction that got declined) |
| X | Credit decline (credit transaction that got declined) |
| E | Error (transaction that did not go through an internal validation of the gateway and was not sent for further processing) |
| B | Blacklist (transaction, which has not been processed, as the account is in the blacklist due to the previous hard decline) |
| N | Return (represents direct debit payment that is not honored by a bank) |
| G | Chargeback (operation of reversal of a prior outbound transfer of funds from a customer's bank account or credit card) |
| R | Reversal (operation where credit card chargeback is reversed - money is given back to the merchant or customer) |
| U | Notice of change (represents direct debit transaction that is returned by the customer's bank as a notification that some details of the transaction were corrected) |
| J | Reject (direct debit payment that is rejected by the bank due to insufficient funds or errors in payment order) |