I worked on a billing system for a government service in the USA. The system served both government clients and non-government ones. The government ones were

I worked on a billing system for a government service in the USA. The system served both government clients and non-government ones. The government ones were tracked as 'federal' and others 'non-federal'. There were mostly minor differences between how the two were handled, but one of those distinctions was in what type of transactions the different category of customer was allowed to use. From the customers perspective, the only real difference when it came to reading the billing information they received was that federal agencies received a bill that said 'federal' and others received a bill that said 'non-federal'. No big deal, right? Well, not to most agencies. But the US government works pretty closely with, and extends government-style permissions to, various native American tribal authorities. Native American tribes... do not like to be considered to be part of the US government. At all. It's entirely understandable, but we had to make a bunch of modifications because they wanted to retain the ability to run 'federal agency' style transactions, but wanted their bills to say 'non-federal'. It actually caused quite a lot of drama, but most of it was isolated to the political side of the agency (software changes are not free, after all, so they tried to be diplomatic and begged the tribes lodging the complaint to just ignore the word 'federal' on the monthly bills they received, but they would not budge and demanded it be changed ASAP) luckily. As software lead on the project I did get to hear about some of the firestorm secondhand when working with management to figure out exactly how we were going to change things. The 'federal' designation was a boolean in the database, used both by us in the billing system to determined what kind of processing to do (it impacted amount charged too, with federal customers getting a small discount) and the frontend of the system to kick out attempts to use transaction types not supported for non-federal agencies. So they couldn't just flip the bit and make them non-federal or it would cause even more chaos. It's been a long time ago now, but I believe we ended up special-casing it so that the report templates for the non-federal bills were applied in cases where the agencies were on a hard-coded list of 'federal but non-federal' agencies. All over text maybe 2 people even ever saw.