DH was trying valiantly to reserve a room in Zermatt with his rudimentary German. The proprietor confirmed that a room was available, but kept talking about "post card." He assumed this to mean that we were to follow up with what we know as a postcard. However, I have seen that term used as a method of payment, so perhaps she was asking for a credit card number?
Since I have the address, and the reservation is for late in September, should I send a letter with credit card information? She does not appear to have email.