Using credit cards(TD U.S. Dollar card) in the states(Florida)
This is the very first time coming down to Florida and I've never been to U.S. before. I had ordered US dollar card at TD before I left ananda. The funny thing was the bank gave me a PIN numbers just like other credit cards I have in Canada but I've never had chance to use that PIN numbers. They just swip the card and ask me to sign on it. Everything's okay so far but this tipping system with credit cards at the restaurants is kinda strange. Again, they don't use chip system and there's no option for adding tips in the machine. What they do is first, they swipe the card, and then print a receipt. And then let me write the amount of tips on the receipt. They don't seem to make another transaction for the tip I just added in the receipt. what's bothering me is that what if those people in the restaurants just add whatever the numbers they want? The funny thing is that the transactions I have made at the restaurants so far have being only billed without the tips. I'm really confused at the moment and worry about people adding tips without my permissions. Could someone help me understand about this? Thanks in advance.