A Sam's Club employee would help out older customers with their debit cards and take an additional $20 in cash. She confessed to stealing over $700 that way before Sam's caught her. If you have elderly family maybe warn them about this scam and encourage them to not let the card out of sight, inspect their receipts, etc.
http://www.kbtx.com/content/news/Sams-Club-cashier-arrested-for-stealing-money-from-elderly-customers-482811101.html
http://www.kbtx.com/content/news/Sams-Club-cashier-arrested-for-stealing-money-from-elderly-customers-482811101.html