I don't know what your case is, but it should be a civil case. In civil litigation, generally speaking, you are the plaintiff, and you have the burden of proof for your own claims, including creditor's rights. If the defendant denies your request, you can not provide evidence.

Regarding the preservation of evidence, there are relevant provisions in the Civil Procedure Law. Are you tired of searching? Just follow the rules.

If you really can't produce some evidence, you can apply to the court for evidence collection. However, it is necessary to submit a written application and communicate with the judge or judge's assistant. It is generally unrealistic to expect a judge to investigate and collect evidence for you.

An assistant judge cannot be a collegiate bench judge. It is illegal for an assistant judge to preside over the court trial, which violates legal procedures and the corresponding trial is invalid.

As for the plaintiff's failure to sign, the judge is not allowed to sign on his behalf. Of course, if you don't sign, it is ok for the judge to indicate this situation.

Don't be impatient. If you don't understand the appeal, it doesn't hurt to ask more.