In most cases you don't even need the users real name.
If I sign up for an account, but the invoice is going to the billing department of my company, why do you care what my real name is?
If I sign up for an account, but the invoice is going to the billing department of my company, why do you care what my real name is?
Because the billing department verifies bills before paying them, and needs to know who to ask about the bill?
And if people really don't want the supplier to know their name, they just type "IT Procurement" into the name field.
Otherwise there should be not a lot of reasons to parse and format Asian names, as suggested plenty times over here. If the incoming invoice has to go through legal checks first, the requirement shall be as codified and supplied, whether it's that the name shall be written back to front or in purple on red.
Maybe I'm just overthinking, likely I am.
I only use POs with my customers. I'm based in Sweden, doing work mostly in Germany, Switzerland, and England, as software sales and contract work. No one has even blinked.
In Swedish it's called a inköpsorder, but often abbreviated PO.
As an example, https://www.betydelse-definition.com/ink%C3%B6psorder has "Inköpsordern (ofta säker man PO som är kort för Purchase Order) är det viktigaste dokumentet i en inköpsverksamhet och är ett avtal mellan två parter. POn definierar vad som köps in och under vilka villkor och förutsättningar."
In English: "The purchase order (often said PO, which is short for Purchase Order) is the most important document in a purchasing operation and is an agreement between two parties. The PO defines what is bought in and under what conditions and requirements."
Looking around, here's a description of purchase order use in the UK: https://gocardless.com/guides/posts/guide-to-purchase-orders...
> Purchase orders are a helpful part of the procurement process, allowing business owners to keep track of incoming orders and to monitor stock levels. It’s a way to see exactly what money is being spent where and at what moment. In some cases, purchase orders are a basic requirement for doing business. Many government agencies and authorities insist upon PO forms being issued before they’ll agree to settle an invoice.
It wasn't hard to find similar examples for other European countries.
There are plenty of situations where you need their full legal name as per passport or other form of identification. In here it's often some form of anti-money laundering laws. The first time I came across it was for a game show where you could win money, but to take the money out of the app, the law required some legal identification.