When verifying someone's PAL for a non-res or ammo sale, what information do you need? Just the full name and lisc number, or do you need one or both of DOB/expiry as well?
^ Exactly that. No need to call the CFC or get their driver's license to check against the PAL or try to verify an address.
Shortly there will be people along to tell you that you NEED to do these things to comply with the law.