su tarjeta

his/her/your card

→ su
phrase Rare #37,846
his/her/your card “Su” can mean his, her, your formal, or their, depending on context. The plural form is “sus tarjetas.”
SP: ¿Ha encontrado su tarjeta de identificación?
EN: Have you found your ID card?

Tom ha perdido su tarjeta de acceso.

Tom has lost his access card.

Ha sido muy amable, guardaré su tarjeta.

That was very kind of you; I’ll keep your card.

— Taxi Express (1998)

Y no tengo su tarjeta.

And I don't have his card.

— Toni Erdmann (2016)

Quizá si alguien tuviera su tarjeta de acceso.

Maybe if someone had his key card.