Is this illegal if i remove from my forums
 

Is this illegal if i remove from my forums. i attach with picture.

vBulletin copyright cannot be removed, and I have no idea about the skin or vBadvanced copyright. I heard you can remove the version number though.

Both are illegal unless you pay to take them off. I know vbadvanced has a branding free option but I dont know about vbulletin.

You can move them though Im sure, or alter it so it doesnt take up so much room.

vBulletin has a branding free option. I think its around 150 if im correct?

version number is ok to remove..

Just took a check at it. Branding free option for vBulletin forums is 120 dollars =]

Just to clean this up into one post.

You are not allowed to remove ANY copyright regardless unless you have the explicit permission to do so. This is for anything related to vBulletin or not. Many software have a 'branding-free' option, which gives you permission to remove the copyright. As for vBulletin, the minimum text must be, unless you have bought a branding-free license,
For your skin/vbAdvanced copyright, you will have to check with the author of those products.

look here..

https://vborg.vbsupport.ru/showthread.php?t=124412

Can't your just remove the bolded part from the Phrase Manager to remove version number?
Forgot to add that even with branding removal I read on the official forums that staff say you cannot say the forum is powered by any non vBulletin software instead, such as phpBB or Invision power Board and it only gives the rights to fully remove a copyright notice from all pages.