Costco Just moved in the Volusia County Florida. I was excited. I paid for a membership on line with my master card. I let a few weeks go by before I went over to the store. After getting my new membership card, I went into the store and placed into my cart about $250 worth of products. The new Costco had a nice selection but not the wows I had heard of. At the pay out, my card that I used to purchase the membership on line that has thousands of credit on it was rejected. I knew I had no issue because I pay off my card EVERY month. I was told that COSTCO - DOES NOT accept Mastercard. Only VISA and debit cards or cash. WOW! They could take my MASTERCARD on line for the membership but Not for in store purchases. MAKES NO SENSE. The excuse is that VISA has demanded that only VISA be allowed in person at their stores. I have great credit and a number of master cards that I pay off EVERY Month. But NO #*#*# Visa. I will not use my debit card because I DO NOT need some hacker to take my bank account information and wipe out my account. Now the customer service people are extremely kind, they can no nothing but speak to the company line. Extremely disappointed. COSTO....... As Sam's Plus member....I see NO more savings at COSTCO. Too bad COSTO is so short sighted.