I take cc's at shows and use ProPay. You must join and pay the fee. I believe for me it has been worth it for my higher ticket items and on custom orders. With checks get the info off the drivers license. I use a carbonless receipt pad from staples. They sign the receipt...this is a must. You check the signatures. You wait about 1 week for the $ to be transferred.to yur accounts. No knuckle buster and no phone hook up needed. Try to restrict their use of cc on items $20 and over. It works for me.