Do I need to sign my passport with my "Full" name?

Question

My normal signatrue is only my first and last name, but I have two middle names, which is shown on my new passport when I applied. Must I sign my full name? Even it doesn't match all my other documents?

Answer 1

Yes.  You must sign your name as it is shown in your passport.

Answer 2

It's my understanding that you should sign whatever way you do your LEGAL signature.  I mean it should match the signature you've done on other legal documents such as your driver's license, your social security card, etc. Hope this helps.