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.

 

[nycjordankix]

i'd say black is better,

 

[Vorpal]

There is no requirement. I signed my passport in blue ink and have used it since. As long as the ink is not red, it doesn't matter what color you use to sign the passport.

 

[ImmiPortalUser]

Thank you !