I rented a house and gave the landlord a copy of my ID card, but I forgot to write the copy, which was invalid. There is a dispute with the landlord when checking out now.
If you don't sign the copy of your ID card, a single copy of your ID card has no legal effect, and you must sign it yourself. If it is not a handwritten signature, it is too easy to forge it. If someone wants to use you, you can just fake it, so I can PS it out. In the future, you have to write notes on the copy, such as what this copy is for.