| F02 | Operation code/transaction code/invalid file format/validation error | 1) Specified bank operation code is invalid;
2) Specified transaction code is either incorrect or invalid;
3) One of the specified fields is either incorrect or invalid;
4) Transaction data has not been validated by the processor. | 
                                                                                                                                                                                                            
                                                                        | F03 | Indicated data incorrect | One or more required identification fields' values are either incorrect or missing. | 
                                                                                                                                                                                                            
                                                                        | N01 | Insufficient Funds | Available balance is not sufficient to cover the amount of the debit entry. | 
                                                                                                                                                                                                            
                                                                        | N02 | Account Closed | Previously active account has been closed by customer or customer's bank. | 
                                                                                                                                                                                                            
                                                                        | N03 | Routing number is incorrect | Either customer's routing number is incorrect or DFI account number is incorrect. | 
                                                                                                                                                                                                            
                                                                        | N04 | Incorrect or invalid account number | Specified account number is either incorrect (i.e. invalid IBAN of the Debtor) or invalid (entry may fail check digit validation or may contain an incorrect number of digits). | 
                                                                                                                                                                                                            
                                                                        | N05 | Account blocked/frozen/deleted/blacklisted/Institution in Default | Specified ACH account is either blocked, frozen, deleted or blacklisted or depository institution is in default. | 
                                                                                                                                                                                                            
                                                                        | N06 | Incorrect account type | Submitted transaction forbidden for this type of account. | 
                                                                                                                                                                                                            
                                                                        | N07 | Instruction canceled/expired/Refer to payer/stop payment | клиент по тем или инным причинам отказывается платить, связатся с клиентом
1) Instruction has been canceled by payer or his bank;
2) Instruction has expired (occures when a service user attempts to convert a DDI which is shown as expired on the paying bank's database);
3) Refer to payer;
4) Payment has stopped. | 
                                                                                                                                                                                                            
                                                                        | N08 | Transferred | Financial institution receives entry destined for an account at a branch that has been transferred to another financial institution. | 
                                                                                                                                                                                                            
                                                                        | N09 | Instruction re-instated/amended | 1) Paying bank may re-instate a cancelled DDI up to two months from cancelation;
2) Paying bank will advise amendment via ADDACS message. | 
                                                                                                                                                                                                            
                                                                        | N10 | Cannot Trace | Trace number is incorrect. | 
                                                                                                                                                                                                            
                                                                        | N11 | Payer deceased | Account holder is deceased (used in the event of a representative payee, guardian, or trustee). | 
                                                                                                                                                                                                            
                                                                        | N12 | Payment Recalled/Chargeback/Return/No Agreement/No Confirmation | 1) Receiver of a recurring debit transaction has stopped payment on a specific ACH debit. RDFI should verify the receiver's intent when a request for stop payment is made to insure this is not intended to be a revocation of authorization;
2) Chargeback has been received;
3) There is one or more issues associated with return entry;
4) There is one or more issues associated with PAD agreement;
5) The payor has requested the debit to be returned as they have did not receive prenotification of a change to the PAD date or amount, or they did not receive written confirmation of a PAD Agreement executed by electronic means. | 
                                                                                                                                                                                                            
                                                                        | N13 | Other/Misalignment | Exception is not defined. | 
                                                                                                                                                                                                            
                                                                        | NM01 | Mandate/advance notice | 1) Mandate data is either missing or incorrect;
2) Payer disputes time, amount or frequency of advance notice and has requested single payment to be countermanded. |