KIA, "What credit card company are you using"
-Using DahSing Bank
"http://www.oanda.com/convert/classic slight diff between interbank and credit card rates."
-my charge shows just the HK$ amount no conversion involved, just like any regular charge (if I did not bother to compare this statement with my confirmation I would not even have caught the surcharge).
PDLM -"Very strange. Every month I make a transaction using my HK-issued Visa card in the UK but denominated in HK$. I always get billed exactly what I should and neither Citibank nor Visa has ever levied a surcharge on me (and nor would I let them). Unless there is more to your story, I would simply refuse to pay in your situation."
-In my original post "since Visa/Master started implementing this charge in April" supposedly this took effect on April 7th, my charge was May 17th, I got my bill yesterday. the bank (Dahsing) claims that they cannot waive the additional charges as it was levied by Mastercard not them the bank, and the only solution was to negotiate with Singapore airlines. . .whom I did call them to see if they could reverse the charges and rebill me in HK. . .their response was that the bill was done in HK, so it's a technicality with the bank. . and to go back to the bank to negotiate - bank refuse to budge, cycle repeats.
Since this new "rule" supposedly took place in April, I don't think there's any harm in scrutinizing your statements in the future. . . just as a precaution.