Translation of "Bearer" in Spanish

This check is payable to the bearer.

Este cheque es al portador.

The bearer of this letter is my friend Suzuki.

El portador de esta carta es mi amigo Suzuki.

And as you've seen, I hate to be the bearer of bad news,

Y como han visto, odio ser portadora de malas noticias,

The Black Prince has his standard-bearer signal a general advance by the infantry.

El príncipe negro indica a su porta-estandarte que de señal de un avance general a la infantería.