When we open bank accounts, we have to show some identifications such a driver’s license and a passport. This is called Customer Due Diligence (CDD).
A Gyosei-Shoshi (Certified Administrative Procedures Legal Specialist) has to comply with this kind of procedure, too.
This is the international demand and FATF (The Financial Action Task Force) is the organization for preventing money laundering.
In Japan, there is a law called “Act on Prevention of Transfer of Criminal Proceeds”, and this law is based on The FATF Recommendations.
https://www.fatf-gafi.org/publications/fatfrecommendations/documents/fatf-recommendations.html
For me, the most common situation would be when I help making agreements on division of inherited properties. I have already prepared necessary forms for CDD and want to use them properly.