Certificate Private Custom Visual

Hi, my company made a custom visual specific for one of our clients.

One of the objectives of this visual is to have some info exported on PPTs, but right now the client cannot do that since the visual is not certified.

How can I certify the visual, given that:

• The visual MUST NOT be publicly available on AppSource (this is mandatory. the code is private, the compiled visual is private, and the visual depends on client's services)
• The visual makes REST calls to a specific client web service, which is forbidden
• The visual renders sanitized HTML with d3, which is forbidden

Given that the visual is private, some of this concers are less of a problem, since the client is fully aware that we are calling a remote service (that's why we made the visual in the first place).

Is it possible to do that? There's no mentions on the documentation about visuals not made for the general public.

The final goal is to have the visual rendered in PPT and PDF.

Thanks,

Alessandro