Why MMID exists
IMPS supports bank transfers, and one documented method identifies the beneficiary through a mobile number and an MMID. The identifier supplies account-related information that a mobile number alone does not necessarily establish.
SBI’s IMPS FAQ describes the seven-digit MMID and distinguishes mobile-number/MMID transfers from account-number/IFSC transfers. RBI’s payment-system glossary expands MMID as Mobile Money Identifier; SBI uses the wording Mobile Money Identification Number. This describes the method; it does not mean that every current bank app displays the same option.
If a customer has been asked for an MMID, first establish the transfer method being used. Searching for it is unnecessary when the actual screen requests a different set of beneficiary details.
Mobile number and MMID work together
For the mobile-number/MMID method, obtain the beneficiary details required by the bank’s supported process. Do not replace the MMID with an account number or guess it from the last digits of another record.
The bank issues the identifier. A retailer cannot create a valid MMID by choosing seven digits. If the beneficiary does not know the appropriate identifier, the beneficiary should check with their bank through its official channels.
Read the bank’s instructions for the current product. Older help pages may describe menus or message commands that have changed, so this glossary does not reproduce an activation SMS or promise a particular screen location.
MMID compared with other banking details
| Detail | Role |
|---|---|
| MMID | Bank-issued account identifier used in the supported mobile-number IMPS method |
| IFSC | Identifies a bank branch for applicable transfer instructions |
| UPI ID | A payment address in UPI |
| PIN or OTP | A credential or authentication code, not a beneficiary account identifier |
These labels should be kept separate. A bank’s account-number-and-IFSC transfer route is not made incorrect merely because it does not ask for MMID.
For transaction tracing after a payment, use the actual payment reference and status. SiOnline’s UTR explanation describes why the transfer record matters when investigating a payment; MMID identifies a different part of the process.
An example of a transfer enquiry
Illustrative example: A customer has a beneficiary’s mobile number and has read that an IMPS transfer may use MMID. Their bank app, however, currently asks for an account number and IFSC.
The operator should follow the actual supported transfer method and confirm the necessary beneficiary details. They should not insert the mobile number into an account-number field or invent an MMID to complete the form.
If the bank offers a separate mobile-number/MMID option, its instructions govern that option. The two methods should not be mixed within one request.
What to check before sending money
Confirm the beneficiary details, intended amount and account selected for payment. Review any beneficiary confirmation information the bank supplies before authorising the transfer.
The bank’s IMPS explanation is a source for its documented method, not a guarantee of another bank’s service availability. For current activation, limits or charges, use the relevant bank’s published information.
A customer should enter any required private credential themselves in the official process. An account identifier should never be confused with permission for a helper to learn the customer’s banking password.
Questions about MMID
Do all IMPS transfers require MMID?
No. Check the bank’s available transfer methods and the fields required by the one being used.
Is MMID the same as a UPI PIN?
No. MMID identifies an account in the described method; a PIN is an authentication credential.
Who can supply the correct MMID?
The account-holding bank is the responsible source. A service counter should not generate or guess one.