If she was balancing her checkbook, did she write a check or use a debit or credit card?
If she wrote a check, she should know the specific amount she paid.
If she used a debit or credit card, the restaurant generally puts a "hold" on a higher amount than the actual charge, and then the tip amount is handled in a separate and later transaction. think about it- when you eat out, they bring you your check. You send your credit card back with the waiter, which they run through the credit authorization system. They bring back the check, your credit card and the authorization form where you write in the gratuity amount and sign.
When they run your card through the credit authorization system on a $50 tab, for instance, the bank actually puts a hold on $50 PLUS an amount to cover the gratuity that you'll write in later. Later, the restaurant will balance their books using the credit slip you signed and that's when the gratuity gets finalized.
More or less, that's how it happens.
So--- If you paid cash or check, you know the exact amount paid. If you used debit or credit, you should have signed for or authorized a specific final amount, so you'll know that. But if you are checking your accounts online very, very soon after the transaction, you might see a higher amount that reflects the amount "reserved" before the transaction is finalized.
Could that explain it?
momrek06 said:
If it is as SNOWFLAKE stated then there needs to be a sign posted in the store near the register explaining that additional charge, so as not to confuse customers (esp. when they are balancing their check books)!!!
Actually, this is a pretty universal practice among all restaurants.