keep your card in view when you give it to a clerk
examine each draft before you sign it, making sure that the total amount is filled in so that additional charges cannot be added later
do not sign blank sales drafts, and make sure that incorrect drafts are voided or destroyed
destroy any carbons from completed sales drafts so that others cannot use the information on the carbon paper
promptly retrieve your card after use, and make sure that you get your own card back
keep all your sales receipts and check them against your monthly statement