@Tod ********
I just reported what happened.
It was not said to me in any funny way at all...
I didn’t want to do it, and still feel uncomfortable about it, tho thankfully the photocopy was illegible for numbers. And like you’ve indicated I didn’t feel I was in a strong enough position to refuse it, or push for an explanation...
However I did query it to make sure I had heard the request correctly and it was repeated to me. It was a request directly from the Thai helper guy who works outside and that everyone raves about being good and helpful...
When I got the photocopy and returned, the helper guy looked at it and then asked me to sign the page, which I did. He then stalled it into the package of documents that I took inside.
Inside the immigration officer stamped the credit card page, together with some of the other pages, but not all, so he was expecting it to be there...
I am watching my credit card now for anything suspicious...