I'm thinking of using Alertpay as my default payment method and my site is not using US Dollars as currency.
When I try to confirm the checkout process and the Alertpay Module passes the total ammount to alertpay's site (with my local currency) I get the following message:
"Sorry, the seller's payment button settings are incorrect [Currency field is invalid]. If you are a buyer, please inform the seller."
Because of this I had to change back my default currency to USD and all works perfectly.
I think it should be an option on alertpay's module to conver the currency to USD before sendng the payment to alertpay.