A "capture paper" is only a document signed by some officer detailed to examine items turned in or presented as an intended souvenir.

Most state something about them being examined for intel purposes and released.

I have a G33/40 that was mailed home before war's end along with a Drilling. Papers no longer exist and I place no value on them.

I don't know when these papers started, but it is possible the pistol could have been mailed home from N Afrika. With or without papers.