It may be laborious, but the only way to disprove this is to list the 50 states (I assumed this is limited in scope to the USA.) and show that in none of them is it true.
Help me out. Pick one, research and edit.
Of course, during this exercise, we may find that there is a place where it IS true. Either way, question answered.
States marked with a * are full participants in NICS, and require FBI approval for purchases. The official form Firearms Transaction Record Part I Over-the-Counter requires either "valid government-issued photo identification" (such as driver's licences) OR two forms of ID. If cheques require more than that in any of those states, we have a winner.
- Alabama *
- Alaska *
- Arizona *
- Arkansas *
- California - No. Can only demand one id for check - via @DVK
- Colorado
- Connecticut
- Delaware *
- Florida
- Georgia *
- Hawaii
- Idaho *
- Illinois - Requires a Firearm Owner's ID to purchase a firearm, and application for this apparently only requires a single ID (driver's license OR state-issued ID)
- Indiana *
- Iowa
- Kansas * - Appears to have no specific requirements for ID for gun purchase. The only restriction is against selling guns to minors, so presumably a gun store clerk may check an ID to verify age, but there is no requirement to check 2 IDs.
- Kentucky *
- Louisiana *
- Maine *
- Maryland *
- Massachusetts - No. Can only demand one id for check
- Michigan - This might fit the criteria of the claim; additional research necessary
- Requires at most a single state-issued ID to obtain a firearm license (p. 9 of PDF--28.422(3)(c)), and a firearm license isn't even necessary for certian types of firearms.
- It is unclear whether a gun store clerk may request the firearm license in addition to another form of ID at time of purchase.
- Seems to have no law limiting the number of IDs used for check acceptance, only which information can be recorded from the IDs.
- Minnesota *
- Mississippi *
- Missouri *
- Montana *
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico *
- New York *
- North Carolina
- North Dakota *
- Ohio *
- Oklahoma *
- Oregon
- Pennsylvania
- Rhode Island *
- South Carolina *
- South Dakota *
- Tennessee
- Texas *
- Utah
- Vermont *
- Virginia - No. Two IDs required for gun
- Washington
- West Virginia *
- Wisconsin
- Wyoming *
- Washington DC *