Comment by tim333

How it works, I'm in the UK, is the government passed a law saying lawyers are responsible for knowing the source of fund and can be fined if they don't do it. It isn't really spelled out how you are supposed to prove the source. In the end I found some paperwork from a more recent source of funds and used that. It's not very organised - they just want some bit of paper in their files saying source was x in case the government has a go at them.

The proof I did use - a more recent inheritance, I could probably use multiple times as there doesn't seem any check on you doing that. The system is not very organized.