14,000 links from affiliate

[Aikijeff]

I have an active affiliate program and notice that webmaster tools is showing a huge number of links from one particular affiliate.

The affiliate is called productwiki.co.uk and they are showing 14,413 links all pointing to my homepage in WMT.  They don't seem to be no follow.

What should I do about this?  Is this a problem?

I have had major issues with my organic traffic dropping right off.

I appreciate any feedback

[MichaelC-15022]

Yes, that's very likely to draw a Penguin penalty, presuming that the links go directly to your domain, and not to an intermediate (like Commission Junction or Shareasale etc., for tracking...those kinds of affiliate programs are understood by Google and handled for you, so no problem if you're using those).

I would ask the affiliate to add a rel=nofollow; if they won't, then I'd disavow their domain.