Baarle-Hertog and Baarle-Nassau are an international village on the border between Belgium and the Netherlands where a store literally can be located in 2 countries at once: a Belgian part and a Dutch part. Lately, the COVID-19 crisis has caused a weird situation where stores in the Baarle-Hertog section must be closed, but the stores in Baarle-Nassau can stay open. In this case, the stores that are in both sections at once can remain open IF the front door is in Baarle-Nassau (front door determines where you live), BUT they need to close off the section that's located in Baarle-Hertog. I don't know whether this is because Belgium ordered all stores to be closed or because Belgium closed their border, but the end result is that these stores essentially can't sell part of their stock because it's located in the Belgian section.
I'm wondering whether there are other cases where a business that's located directly over the border between 2 legal entities with separate jurisdictions needs to adhere to 2 separate jurisdictions that might even conflict with each other. Someone thought Texarkana in the USA on the Texas/Arkansas border might have that, but they weren't sure themselves, and checking now it appears that the border runs right down the middle of a street at all times, so it might not apply here.