I did not beat it to death, but I have asked two local gun dealers within the past 30 days how long they keep the paper and they said forever.
One said that if they ever came around to take our guns, he would burn it.
I hope some gun dealer will post here what the ATF is requiring today.
I would bet that like the IRS, they make their own rules as they go along.
Sales records are a different animal.
They are kept by the FFL permanently, I believe.
I’ll look it up and post the info.
I seem to recall that if an FFL goes out of business, they have to handover their records to the ATF. All businesses eventually go out of business.