Paypal credit card refund failing when currency is set to GBP

Paypal credit card refund failing when currency is set to GBP

I've implemented the PayPal credit card payment xml api, using the WSDLs
they provided. Everything appears to work great if the currency is USD. My
initial transactions are approved and my refunds both partial and full
succeed as well. However, I have issues when I switch from USD to GBP. The
GBP credit card authorization request succeeds but when I try to perform a
refund I get back an error code of 10009 "You cannot refund this type of
transaction". The same code is being executed for USD and GBP the only
difference between the requests is the currency code being set on the
amount and I'm at a loss to why USD refund requests succeed for USD
payments but GBP refunds fail for GBP payments. Any help is appreciated.
Thanks