does it matter what colour pen I use to sign all the IMM forms?

[Ema2000]

does it matter what colour pen I use to sign all the IMM forms?

blue or black

my partner said it should be black .... but I can not find anything in the guide? I have no idea where he read it and he can not remember?

thanks

 

[canadausa#11]

It says on a number of the forms, type or print in black ink.