On Sunday June 9,2007 I went shopping at Walmart. At the register I gave a blank check with my signature to pay my bill. The clerk gave my check which was blank and a receipt for my purchase. I ask the clerk to void my check and redo the transaction at another register where the printer was was working, She refuse and so did her supervisor refuse. I had to go to the assistant store manager to complete the transaction properly. I was so irate that I called 1800-walmart to make a complaint. I spoke with someone from customer service but did not receive satisfaction. I tried to make a complaint on the computer but the computer kept knocking me out so I could not complain. I feel top mgmt needs to be informed.