Field 3 – Processing Code
Processing Code is the field that indicates what type of transaction is being performed. It is very critical information for authorization.
For example, the Processing Code information for a Sale transaction made from a POS is different from the Processing Code information for a Cash Withdrawal transaction made from an ATM.
Processing Code information is a 6-digit numeric value. It consists of the following components:
- Transaction type code, an 2 – Indicates the type of the transaction;
- Account type code 1, an 2 – Indicates the account type affected as 'credit' ("from");
- Account type code 2, an 2 – Indicates the account type affected as 'debit'. ("to").
Transaction type values:
| Transaction type | Description |
| 00 | Authorization (Goods and Services) |
| 01 | Cash (ATM) |
| 02 | Debit Adjustment |
| 20 | Refund |
| 30 | Available funds inquiry |
| 31 | Balance inquiry |
| 50 | Payment from account |
| 53 | Payment to account |
Account type values:
| Account Type | Description |
| 00 | Default – unspecified |
| 10 | Savings account |
| 20 | Cheque account |
| 30 | Credit facility |
| 40 | Universal account |
| 50 | Investment account |
| 60 | Electronic purse card account |
