Is there any way to remove the ugly "Signatory hash" permanently?

It is very ugly, and the documents are not accepted anymore from my supplier and partners.

I have to go away from Odoo 16 if it's not possible to remove permanently. 

Yeah sure as an Internal User... yes... yes... I can read the docs too... then I can remove the "mark" (https://www.odoo.com/documentation/16.0/de/applications/finance/sign.html#signatory-hash)

But a normal Anonymous User will not see that, or remove the mark, ´cause the User just want to sign the **$%&?! document.