No format is available for this offense.
The user is technically using "fake vouches" or "self vouching."
Users are not allowed to use vouches from another account in any circumstance. I'm assuming that this is no different.
User's profile - http://www.sythe.org/members/199414-aroxez.html
Proof - User's signature has the old vouches linked as the first link.
^That link - Aroxez's Vouches