Right now there is non. Since the last update on the bitcointalk forum, newbie members cannot carry anymore a signature, not like the last time before update that they can use a signature. It is good to upgrade your account to Jr. Member.
The new rules implemented is intended to clean up the forum from spammers that is abusing the bounties. For now if you are really a newbie then learn first and research what this forum is all about and it's connection to bitcoin/cryptocurrencies.