Sign passport in blue or black ink?

[ImmiPortalUser]

For Nat. certification there were instructions to sign in blank ink only. For passport is there any requirement? Thank you.

 

[cafeconleche]

It doesn't matter.

 

[Jackolantern]

Blank ink? LOL

 

[Usher]

You can't go wrong with black.

 

[ImmiPortalUser]

Thank you!

 

[USER2345]

Black goes with everything!

 

[cafeconleche]

I usually sign with blue because it looks like it's more likely original, and not a copy. In black, it is sometimes hard to tell which one's the original, and which one's the copy. Of course, this doesn't apply as much to a passport.