If you prefer to shop or dine without cash, many merchants conveniently allow customers to leave a tip using a credit or debit card. Whether you're tipping a waiter at your favorite restaurant or the person that shampoos your hair at a salon, leaving a tip on your debit or credit card is easy.
Ask a staff member if you can leave a tip using your debit or credit card before she leaves the table. Some establishments are unable to permit customers to leave a tip on the card after they have swiped the card.
Give the card to your server or other designated person, such as a cashier. After the server returns, he will provide merchant and customer copies of the receipt.
Write the tip amount on the appropriate line. Add your bill total -- which is usually on the first line -- and tip amount -- usually on the second line -- together. Write the total on the third line. Sign both copies of the receipt. Keep a copy for yourself and give the other copy to your server.