I bet no one even considered the idea that someone in Canada might pay in USD dollars.

I had to... discuss... with someone the possibility that if we were recording money received from a bank, we might do well to record the currency type as well, because... banks can deal with multiple currencies. "No, banks don't do that. That's not possible". This US company was getting ready to expand their services over to Europe, and I couldn't understand why no one could understand that this might be a necessary item to record.

Someone using this system in France to help finance a project in New York, for example, might want to know whether Euros or USD were the subject of the project. This was sort of a PM tool to note the cost of a project and how much was left in a budget - it wasn't moving money directly. We had a system to choose specific banks and note that 'person X moved Y currency units to the project' but... no ability to select the currency units. If it was from a UK bank, it would be GBP. A US bank, USD, etc. I was voted down as not understanding how banks worked.

Months later, a demo was presented right before launch to the people who were financing the project, and they asked how someone would know the currency being used for each project. Back came a work ticket "high priority" because we were already late for launch and multiple screens now had to accommodate this "new" requirement.

I know at least some of this is how I present info, but... being 'nice', being 'inquisitive', raising issues up the chain of command, etc.. rarely work. These sorts of extremely obvious things get ignored until the actual end users bring up the same concern. Somehow I wasn't supposed to know this sort of info because "you're a developer, you're not some international banker". Insane...