[codeniko]

Highly doubt they cancel it if you SE it. I imagine those software boxes are mass produced with codes already in them. You buy one, they ship it to you and then you register the product with your name and it ties it to the code you used. Highly doubt they insert a customized code for every customer that orders it and tracks it.

One thing they can do though is monitor your name/address when they shipped it to you and see if you activate with any code, despite you saying you didn't receive it. This could then be flagged and investigated.