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You may see diagnostic (DIAG) codes at the bottom of transaction receipts and reports. Some indicate an error while others offer information. More than one diagnostic code may be printed. For example DIAG 828282 would indicate three communication failure attempts during a transaction.
| 52 | Offline or Forced Transaction. This is not an error and is for information only. |
| 53 | Offline store is full. You should attempt an online transaction. If the problem persists check the mobile network (mobile terminals), telephone line or LAN (Bluetooth terminals), and contact the terminal Helpdesk quoting the full diagnostic code. |
| 61 | PIN Bypass attempted. This is not an error and is for information only. |
| 62 | PIN tries exceeded. This is not an error and is for information only. |
| 70xx | Error in transaction security. Normally indicates that the MAC code is invalid, contact the terminal Helpdesk quoting the full diagnostic code. |
| 72 | Merchant has indicated an invalid signature. This is not an error and is for information only. |
| 93 | Transaction cancelled by the operator. This is not an error and is for information only. |