Based on the search results, MPIN can stand for two different things:
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Marketing Partner Identification Number: This is a code that is created by a user during the registration process for the System for Award Management (SAM) . It is a personal code that acts as a password to access government databases and applications, such as SAM.gov and Grants.gov, for registration and renewal purposes, as well as searching for contracting and award opportunities in the federal marketplace. The MPIN is nine characters in length, must contain both letters and numbers, and cannot have spaces or special characters.
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Personal Identification Number: This is a numeric passcode used in the process of authenticating a user accessing a system. It is used to validate the identity of the user, and is often used in conjunction with a Personal Account Number (PAN) . The issuing bank calculates a PVV value from the entered PIN and PAN and compares this value to the reference PVV. If the reference PVV and the calculated PVV match, the correct PIN was entered.
Therefore, the meaning of MPIN depends on the context in which it is used.
