Sadly this is a fairly common practice in 135 Checkrides, rather than fail we will just count this as a training flight. A Checkride form must be signed by the applicant to make it valid regardless of pass or fail. A training flight does not need this signature. Basically the check airman turned the Checkride into a training flight. Not an acceptable practice and one which could cost him his check airman qualification. That being said I would not include this on pria paperwork. You did not work for this company as a pilot and never completed training either. No there won't be any paperwork sent in to the FAA. No you did not fail a Checkride, although you should have. While what happened is prohibited by the FAA I guess it worked in your favor. Fact is the company is not even required to retain your training records as you were never employed by them, and effectively washed out of training.
PRIA is a very interesting bird really. I've seen responses such as yep this person was employed by us as a pilot and others that came back as an entire binder. It's very much up to the previous employer what is included. The Feds do provide suggested guidance but that's really all it is, suggestions.
Thank you very much for your explanation. it definitely cleared things up for me. Appreciate your imput.