Here is the payment policy straight from the website:
PAYMENT REQUIREMENTS: Payment(s) must be in U.S. dollars and received in our office on the date(s) set forth in the Guest Confirmation or vacation packages will be deemed cancelled by you.
We accept all major credit cards, Disney Gift Cards, the Disney Rewards Card and checks. If you pay by check, please: (i) write your reservation number and vacation commencement date on the face of the check; (ii) ensure that the check has a pre-printed name, address and account number; (iii) do not post-date your check (we will reject it); (iv) ensure that we receive your check by the date set forth in your Confirmation; and (v) make check payable to, and mail to,
Adventures by Disney Travel Services, Inc., Attn: Cash Operations, P.O. Box 61010, Anaheim CA 92803-1010 or courier to Adventures by Disney Travel Services, Inc., Attn: Deposit Payments, 1020 W. Ball Road, DL361A, Anaheim, CA 92802. Do not send cash.