And I believe the NL tax reporting for large gifts also requires you to identify the donor.
In essence, the limitation is not on the method of payment but on the core activity, that any significant income from contracts, deals, trades, barters, transfers, gifts, settlements etc need to be non-anonymous in order to be legitimate, so if the method of payment does not identify the payer (i.e. cash) then simply it's your duty to identify who you're dealing with, from whom you are earning money.
Last time I sold a house, the only reason I met with the buyer directly was because I didn't use an agent for the sale.
Perhaps a relevant different example I've seen sometimes is that in some markets for tax reasons developers who build larger buildings (offices, apartments) will make a separate LLC for each building, so when they want to sell it, the title to the real estate doesn't change hands (it still belongs to the same company) but rather they sell the whole "company" instead with the building as its main/only asset.
This thread is not about privacy from other private citizens/companies, but privacy from the state authorities. For example, my bank account is private in the first sense (even my parents couldn't find out how much money I have unless I tell them), but it's not private in the second sense (financial authorities have the right to ask my bank how much money I have).
But most homeowners don't have the house in a trust. That's mostly a rich-people thing. The default is that it's your personal name(s) on the documents, including in e.g. county tax records.
[0] https://www.bloomberg.com/news/articles/2022-06-15/germany-t...
https://www.loyensloeff.com/insights/news--events/news/bill-...
In New York, properties are commonly held by LLCs. Transferring ownership of the LLC can be done without any public or auditable record of the transaction.
The Dutch Government also asked for a blanket ban on cash transactions above €5,000 to be included in AML 6/7 (although there wasn't wide support).