Cash is not accepted.
The payment options available are:
- Check (if you're outside the US or the Eurozone, then you have to supply a check in US funds drawn from a US bank, just go to the bank and tell them this is what you want and they'll take care of the rest).
- The following credit cards: Visa, Mastercard, American Express, Discover, Diners
- Wire transfer to PMI's account (I think you have to attach the proof of the wire transfer with your application)