[Tinner666]

I Googled fro you and these came right up.
http://www.fbi.gov/about-us/cjis/nic...sked-questions

Frequently Asked VAF Questions
■What does UPIN stand for? Unique Personal Identification Number
■Can anyone apply for a VAF UPIN? You are encouraged to submit an appeal request first. The VAF was originally established to permit individuals to request the NICS maintain information about themselves in the VAF to prevent future erroneous denials or extended delays of a firearm transfer. The AST will refer you to the VAF upon completion of your appeal if the VAF will prevent future extended delays or erroneous denials.
■How do I use the VAF UPIN? When filling out the Bureau of Alcohol, Tobacco, Firearms and Explosives Form 4473, you must place the VAF UPIN in box “9” and also advise the FFL you have a VAF UPIN.
■Once I get my UPIN, does that mean I will never be delayed or denied a firearm purchase again? Entry into the VAF will not automatically result in a proceed response on subsequent firearm purchases. A complete NICS check is still required and will result in a denial or delay if additional prohibitive or potentially prohibitive information is discovered.

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