If you have your own signature on the white paper and accidentally lose it, the remedy will be affected by different situations. Here are some possible solutions:

1. Find a backup: First, you can check whether the white paper you signed has a backup. You can check whether there are other copies, scans or photos.

2. supporting documents: if this signed white paper has legal or legal effect, you can try to contact relevant institutions or authorities to solve the problem. You may need to provide other supporting documents to prove that you are the owner of the signature and explain your situation. Institutions or authorities can guide you on the steps you need to take.

3. Statement and testimony: If you need to prove that this signature is important to you, you can provide testimony or written statement. You can consult relevant institutions, lawyers or other professionals on how to prepare and use these documents.

4. Change authentication: If your signature is lost and cannot be retrieved, you may need to consider creating a new signature to replace the lost signature. This new signature can be used in subsequent documents and transactions.

In any case, if you lose your signature on white paper and need to copy or replace it, the best way is to consult professionals or relevant institutions for specific guidance and suggestions.