I use PayPal for sending payments (http://www.paypal.com). All prices are in US dollars. You do not need a PayPal account to pay via PayPal. PayPal accepts credit cards or transfers from your bank account. You will receive a payment confirmation notification from PayPal.
Alternatively I accept bank transfers.
For any other payment methods your institution may prefer, please contact me and I would be happy to work with you.
If your university is willing to pay for the work, I would be happy to work with you and your university administrator to file any necessary paperwork. If you have any questions, please feel free to ask!