Private sale background check - an app for that?

[Mindflayer]

Voter registration card doesn't cover people prohibited by 18 U.S.C. § 922(g)(9) or under current mental health care. Yup, all your points are valid. It would be a pain and might introduce new issues... but might also get people off our back for "being diligent".

Of course, diligence isn't working for the video game industry right now....

[GeneFrenkle]

I understand and appreciate the desire to be proactive and absolute in ensuring a legal transaction, so don't get me wrong. It's a good idea, I'm just not sure the benefit/cost tradeoff and business process is there. There are also a couple of other things to consider:

1 - I thought somewhere the law stated that it was to the "best of knowledge". I can't find it right now and have to leave work to take care of animals
2 - data latency. Consider this use case: seller becomes a prohibited person according to 922(g)(9) and engages in a sale prior to the propagation of data to the validation system. Granted, it's not a unique use case as the same issue exists with NICS, minimally.
3 - what's the probability of occurrence? And generally (hand-waving here because I can't find the study), folks have been found to "feel" uneasy around mentally unsound individuals (which is why they tend to be "loners").