order number

so i went to the PayByCash section in the upgrade account thing, and i chose, eCheck (one time direct) option. i filled out all the questions. and i got this at the end.

Order Number: ***-****-****
Account Name: ********
Service: RuneScape HD
1 Month Subscription
PayByCash Price: $7.99 US Dollars

(actually shows the order number and account name)

Im trying to verify the order number so i can make my account a member.

Does anyone know where i can verify it? Thank you.