I tried to purchase a SAVER 1st CLASS DAY PASS, using a MasterCard and a VISA CC, I got the message "transaction was rejected". I contacted the bank for each, they did NOT reject the transaction, it must have been DATATRANS LTD. (SBB agent for credit cards). Using an American Express CC I was able complete the purchase. Since my MasterCard and VISA were issued by USA banks could be the problem. Has anyone had similar problems?