SFMS ACK/NAK Messages Processing

Message Name	Message Description
F20	This is an acknowledgment message from SFMS.
F25	This is a Negative acknowledgment message from SFMS. User can take manual action on outgoing payment transaction.
F26	This is a Negative acknowledgment message from SFMS user. User can take manual action on outgoing payment transaction.
F27	This is an acknowledgment message from Bank API (IDRBT/RBI). If this message is Negative Acknowledgment, then user can take manual action on outgoing payment transaction.

Processing Steps:

On receipt of incoming F20/F27 ACK messages from SFMS, system parses the message and process. The parent transaction is fetched based on following matching fields: (Note: F20/F27 ACK is received for the N06 messages sent in a bundle of 10)

Matching:
- External Application Sequence number mentioned in the F20/F27 message is matched against the sequence number sent in the original outgoing payment transaction/message (N06) in Block A header and the IFSC Code of the Originating branch (Our IFSC Code).
Message Status Update: If matched,
- For F20 (Message Identifier in the format) received, original outgoing payment gets updated
- i.e, All the ‘10’ transactions sent in the N06 bundle having the same sequence number is updated
For F27 (Message Identifier in the format) received,
- System checks the ‘Bank API Response Code’ field
- i.e, All the ‘10’ transactions sent in the N06 bundle having the same sequence number is updated

NAK Processing:

On receipt of incoming F25/F26/F27 NAK messages from SFMS, system parses the message and process. The parent transaction is fetched based on following matching fields: (Note: F25/F26/F27 ACK is received for the N06 messages sent in a bundle of 10)

- Matching:

- External Application Sequence number mentioned in the F25/F26/F27 message is matched against the sequence number sent in the original outgoing payment transaction/message (N06) in Block A header and the IFSC Code of the Originating branch (Our IFSC Code).

Manual action and Message Status Update: If matched,

System waits for user action to be taken from the new screen – Negative Acknowledgement Message Details. Screen PTSFNAKQ will no longer be used and removed from the system.
Below steps are performed form new screen - Negative Acknowledgement Message Details:
- User will select the N06 single record from PTSOUTBR and click ‘Process NAK’ option. In case, multiple records are selected and ‘Process NAK’ option is clicked then system throws an error.
- System opens the Negative Acknowledgement message details screen.
- Transaction Details section of the screen lists out the transactions bundled in the original N06 message. By default, all the messages are selected. So, the manual action is applicable for all the underlying transactions in the N06 bundled message.

Dispatch Reversal Accounting for NEFT Outbound	Event	Dr/Cr	Account	Account Type	Amount Tag
NEFT Outbound	DCLG	Dr	Nostro Account	Account	FILE_AMT
NEFT Outbound	DCLG	Cr	Network Clearing GL	GL	FILE_AMT

Dispatch Reversal Accounting for NEFT Outbound	Event	Dr/Cr	Account	Account Type	Amount Tag
NEFT Outbound	DRLQ	Dr	Network Clearing GL	GL	XFER_AMT
NEFT Outbound	DRLQ	Cr	Intermediary GL	GL	XFER_AMT
NEFT Outbound	DRLQ	Dr	Intermediary GL	GL	XFER_AMT
NEFT Outbound	DRLQ	Cr	Customer Account	Account	XFER_AMT

Parent topic: NEFT Acknowledgment Processing