to whom it may concern
US /tə huːm ɪt meɪ kənˈsɜːrn/
UK /tə huːm ɪt meɪ kənˈsɜːrn/

1.
A quem possa interessar
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.
Comecei a carta de apresentação com 'A quem possa interessar', pois não sabia o nome do gerente de contratação.
•
The official notice was addressed 'To Whom It May Concern'.
O aviso oficial foi endereçado 'A quem possa interessar'.