If an employee resigns how many days do you have to get them their final check?

On the IRS site, they say that each pay date is called "constructive receipt" date. Every employee must be paid by this date.

100000000000000000000000000000000000000000000000000000000 hours

This really depends...On the country in which you do the background check, on the depth required in the search (some checks only look for convictions, some look into more detail, such as an arrest...

Just a few minutes if they do it electronically . If they send the actual paper check through the system, it may take as long as 10 days.

The deal will be final once you say so... or a week!=D