The Number 1 Question we are asked is "What is the fastest way to register?". Although we certainly accept registrations paid for by a check in $US, or by purchase order (to be paid for later by a check in $US), we can ALSO accept Visa, MasterCard, and American Express cards. However, please note: At the time of registration, we need the exact and complete billing name and address of the cardholder, for card verification, before we can process an order. If you wish to use a credit card for registering, please include this credit card information on the registration form.