WTF is this Region code on BidPay?

[Wallydraigle]

I am using BidPay to send payment for an auction to Peru, and I am a little confused. I have no idea what they mean by Region and it won't let me just skip it. I have to enter something or it won't process my payment. Can someone who is familiar with addresses in Peru PM me please? I would appreciate it.

 

[Wallydraigle]

I sent the seller an email, but it took three or four days to get a response from him the last time I sent one. *Sigh*