Normally if they are checking receipts it is because the store has a shop lifting problem. In other words, the store is situated in an area where losers and shoplifters regularly go to walmart to steal. The receipt checking action might indicate that you may be sharing the shopping aisles with criminal types who might not hesitate to shoplift your car, your wallet or your purse.

Check the walmart notices when you step foot on the their premises, they are responsible for NOTHING, including your personal safety.