I'm not aware of any specific document, but then again - Every company and every product would be different. If you do final acceptance testing I would think that a copy of that report would be sufficient.
You will find a lot of folks here in posts like this will also say you should ask your customer directly specifically what they want. Their generically asking for something like "...documentation of the results of your internal testing prior to shipment..." would be to me final acceptance testing. Ask them if that is what they want, and if they're "not sure" or something like that, offer them a copy of your final acceptance test report(s).