to whom it may concern

US /tə huːm ɪt meɪ kənˈsɜːrn/
UK /tə huːm ɪt meɪ kənˈsɜːrn/
"to whom it may concern" picture
1.

A quien corresponda

a formal salutation used when the recipient's name is unknown or when the letter is addressed to an organization rather than an individual

:
I started the cover letter with 'To Whom It May Concern' as I didn't know the hiring manager's name.
Empecé la carta de presentación con 'A quien corresponda' ya que no sabía el nombre del gerente de contratación.
The official notice was addressed 'To Whom It May Concern'.
El aviso oficial estaba dirigido 'A quien corresponda'.