My boyfriend is a loyal patron. He has been going ...

My boyfriend is a loyal patron. He has been going to Oh Bryons approximately 5 years now.
Last night, friends of ours visited and we wanted a comfortable place for dinner and drinks.
Imagine our disappointment and shock today, reviewing banl transactilns, when we saw the server had added an additional 12.00 to this bill AFTER the visa was signed and marked paid for a different total. We left her a reasonable cash tip.
This was unauthorized.
I will be telling EVERYONE check your charge slips. This is stealing.
So disappointed.