Join Date: Dec 2002
Location: Danville, CA, USA;
Programs: UA 1MM, WN CP, Marriott LT Plat, Hilton Gold, IC Plat
Posts: 18,069
It is against Visa's terms of conditions for a merchant to require dynamic conversion, but that argument has never stopped them when I protest.
Best thing to do is to document the transaction and complain to Visa, hopefully the merchant will get slapped down.