Tracking PDF quotes
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I've recently done a few quotes in the past months for a "friend". It was only recently I did him a favour in doing a basic brief design he could give to his boss (was redoing their site, 10~ static pages) along side a quote. 

However I feel that he is outsourcing to another freelancer/company and using my brief as reference, his "boss" pulled out of the work but had another company do the site. Following my brief exactly the site looked almost identical to the mock up (gave no code etc), again perhaps they followed his requests as I did.

I've came up with a few ideas to see if my work is getting passed around.

 1. Embed tracking JS into PDF file (I'm not sure how reliable this is)
 2. Write a custom section into my website that requires login (give him user/pw) then track usage + unique name pdf download?

I know he could easily screenshot the files but I have a gut feeling that something fishy is going on.

Normally I would write off this person for wasting my time but he has got me great clients in the past through his recommendations.

Not sure if this is the right website to be asking this but a lot of people do the same thing here so I hope somebody may of been down this road before.

Thanks