Scammer on DigitalPoint

We have found scammer on DigitalPoint forum who is selling software produced by our company.
He purchased it from us, now reselling on multiple forums.
Bad news for buyers is that key product of our software will never work on their domains as it requires unique registration key that ony we at can generate.
Of course we will not provide support for such purchased software.

However my question is how to alert DigitalPoint about scammer and cause to remove his offer on DigitalPoint....

Scammer on DigitalPoint

Poster :