​For SIP payments to be automatically debited, the SIP must be linked to a registered mandate. If the mandate is not linked at the time of SIP setup, the debit instruction will not be triggered. What is a registered mandate?

Even if the SIP is linked to a valid mandate, the auto-debit may still fail in the following cases:

1. Insufficient Opening Balance: The debit instruction checks for the opening balance in your registered bank account on the transaction day (T-day). If the available opening balance is less than the SIP amount, the debit will fail. Note that funds added to the account later during the day are not considered.

2. Bank Rejection: If your bank rejects the debit despite having a sufficient opening balance, the transaction will fail. In such cases, it is recommended to contact your bank to identify the reason for the rejection.

To avoid failures, ensure that:

1. A valid and active mandate is linked to the SIP.
2. Your bank account maintains a sufficient balance at the start of the SIP debit day.​