[Core Entropy]

That does not always work.

In my experience (which is not even close to done) what i have done is make sure i have a wal-mart plastic bag. then i go in like 10 minutes before closing and get what i want (i ALWAYS have a fake receipt) Usually wal-mart will shut off the gate thing that beeps when u steal at closing and an announcement will be made to get out. Someone will come and tell you to check out, so say you did. Someone will be at the door and if you just go to walk out they will 50% of time ask to see receipt. There ya go for wal-mart.

Also if its like a house phone (fancy wireless i have done this before) then all u need to do is destroy the bar code, rough the phone just enough to make it look used, and then walk over to customer service. Walk up and say yes my phone is not working correctly, they will 3 quarters of the time give u a new one all fine and stuff. If they ask for a receipt, tell them you don't have one, they will say too bad and then you walk out.