How to validate a win 7 small business license?

Question

Windows

Good afternoon! There are 25 PCs in a commercial organization, purchased five years ago in parts from different stores. All have windows 7 pro OEM installed. On part of the PC there are certificates of authenticity, on the part they are gnawed and not readable, on a couple they are not at all. Also, most PCs do not have any documents confirming the fact of purchase. How can, in the case of a justified request from any inspection bodies, prove the rights to use the products? I did not find an unambiguous answer on the forums: small business does not apply either to private users who need the sticker on the case itself, or to corporate giants with KMA \ KMS with mandatory agreements and an Open License.
What to do with computers with a sticker, but without documents? Is it possible to get a sticker on a computer with purchase documents? Is it possible to do this now, in 2018, without buying win10\8\8.1 if the organization is not participating in any MS programs yet?

Answer 1

How to confirm win 7 license

The main confirmation is the software purchase documents.

What to do with computers with a sticker, but without documents?

There are no documents confirming the purchase - no right to use.

Is it possible to get a sticker on a computer with purchase documents? Is it possible to do this now, in 2018, without buying win10\8\8.1

If you need to leave windows7 on computers, google "buy GGK Win7". There are still leftovers for sale, judging by the issuance of Google.