I was scammed in East Asia once. Just overall tip, as it's already been implied/noted here: if any masseur tells to you alter your payment before you meet, it is a scam. In my case, a lot of these guys use LINE or WeChat (Asian chat apps) for their communications after they match with you on some gay app. For me, once I arrived at the masseur's address, the person asked me to use the payment to buy some type of credits for an online game instead (this was prior to meeting; I was only outside their address). After my first purchase, which was legit and inside a 7-11, the person then told me I didn't buy the right kind. I was bewildered. Apparently a passport was then needed for the purchase, and I immediately nope-d out.