to whom it may concern

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

À qui de droit

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.
J'ai commencé la lettre de motivation par 'À qui de droit' car je ne connaissais pas le nom du responsable du recrutement.
The official notice was addressed 'To Whom It May Concern'.
L'avis officiel était adressé 'À qui de droit'.