It depends on the forum. You probably haven't searched far enough to find a forum thaty will.

Also, make sure they are dofollow.

try to fix up with relevent forum like healthcare .

I simply searched with: "powered by vbulletin" workout - the third forum I clicked into had a couple members with signature links.

Other forum signatures: phpbb, SMF, expression engine, etc.

No one will compile the list for you and you won't find an up-to-date list all ready to go for you on the web.

Never noticed this problem to be honest.

I was recently searching for forums in my niche (I simply Googled [niche forums]) and 3 out of the top 5 allowed dofollow sigs.

A word of advise though: Since forum posting can be a great way to build up a good reputation, hence you don't want to appear spammy, consider having a sig which is similar to most member's on that forums, and then inserting something like:

"Please feel free to check out my website: [link]"

At the end. This way, I doubt any mods would mind (compared to - say - just having a link and nothing else in your sig).

I agree that to find out those that allow forum signature, just look at your competitors' backlinks - you will surely find several. And if i may suggest, you can also post on no follow forums, you will still get traffic from members.

Please dont mind this question.When talking about checking backlinks of competitors,guess you are talking about using yahoo site explorer or any other way.

TBH forum signature links are such low hanging fruit, its actually laying on the floor half rotten and covered in wasps....

the other reason people don't allow them in a lot of forums, is because people keep signing up and writing crap posts with signatures the size of a small city promoting their links.

Funny old world.

If I was a forum owner, i would disable the URL's also. Forums should be all about the community and not marketing.