Not forced like the Chinese locked terminals at least. But it was unfortunately unavoidable sometimes whether it was the wording, language barrier, the clerk's reflexes, or willful.

Poland's MO seemed to be more deceptive language than anything else. The terminal switched to English with a large "Approve Transaction?" Way down at the bottom in small text it would have USD above Green, Red for (local currency).

Nearly all the convenience and grocery stores had a customer facing terminal, but the cafes, restaurants, lodging, and some tourist attractions did not. Since the cashier sometimes didn't read enough English to decode it or didn't care to since it was busy, they just hit the green button probably only seeing the approve transaction part. (Giving them the benefit of the doubt in that event.) At sit-down restaurants they wouldn't hand me the terminal since they wanted to avoid the tip being placed on the card and not made in cash. (Per the locals.) Even though you just round up the amount so it's not much to begin with.

It tended to happen more in high volume locations like cafes during a lunch rush where I'll believe it wasn't willful. After I started pre-specifying that I wanted to pay in Polish złoty it happened less frequently, but still sometimes. I only had one place that I'm sure did it out of spite since they really wanted me to pay in cash. Plus a few touristy places (museums, one bar on a crawl.)

I'd always ask to have the transaction re-run if there was available time (not a quick line at a busy cafe.) If that didn't work I'd cross out the DCC language and USD amount on the receipt, and circle back with Chase who issued courtesy credits. Followed by a negative yelp or tripadvisor review if it seemed intentional and/or they refused.

ATMs complied but made it seem like you would unleash world war three if you declined their offer. Several required multiple opt-outs of their amazing opportunity.

I head back in six months so I'll be able to conduct further observations and experiments.