As a clerk in a law firm, you need to know what all lawyers know. Can you introduce some books that are easy to understand?

1. When a party entrusts a lawyer, it is necessary to apply for a case approval form and a power of attorney. If the client is a natural person, a copy of ID card is required. If the party is a unit, a copy of the business license and a copy of the organization code certificate need to be stamped with the official seal. Of course, it is necessary to sign a contract with the customer.

2. If you appear in court, you need a court appearance from the law firm and give it to the court.

As for your saying that the copies of those documents are invalid, this question is too vague. It depends. However, we should pay attention to one thing: generally, we should not accept the original evidence of the parties easily, but copy it down and ask the parties for the original before the trial, otherwise we will bear great responsibility for losing it.