"On February 18 I was traveling and stoped at this restaurant for a dinner. My bill was $35.57 (after taxes). I wrote $7.00 as a tip (more than 20% before taxes). When I was walking to my car, I received 2 notifications from my credit card: one for $35.57, the second one for 12.00 (both charged by Red Line). I walked back to the restaurant and asked to speak to the manager. The gentleman to whom I asked said he was the manager. I explained what happened, asking him to correct the amount 12 to 7). He said I should wait a couple of days because they do a pre-authorization and later on they adjust according to the tip the customer writes in the bill. After many days I checked in my credit card statement, it now shows only one payment to Red Line of $47.57, which is the result of 35.57 12. I had to contest it to my bank. I'm VERY UPSET with this restaurant (obviously the amount is small, but that is not how restaurants should treat customers regarding adjustments done on bills tips)."