Check once a year how many phone numbers and bank cards are registered in your name, and cancel any you didn't open yourself

High value
Evidence C
Saves money
Free
Takes minutes
No willpower

In plain words

Some people use other people's ID cards to open phone numbers and run scams, and the owner often has no idea. There are now free official lookups that show how many phone numbers are registered in your name, how many app accounts your phone number is linked to, and which UnionPay (银联) cards are in your name. If you find one you don't recognize, check with the carrier or the bank and cancel it.

Mentioned in

Check your own credit report for free twice a year for loans and cards you didn't take out
Before you change your phone number or stop using your old one, move your bank, payment and social accounts to the new number first, and don't just let the old one run up unpaid bills until it is cut off

Translated from the Chinese original. Original book, section 14, tip 11. Content may be out of date and rules differ by place. When you actually deal with an agency, a doctor or a court, follow what local officials, doctors and lawyers tell you. Disclaimer