doesn't have to
Tom no tiene por qué ir a la escuela hoy.
Tom doesn't have to go to school today.
Una pizarra no tiene por qué ser necesariamente negra.
A blackboard doesn't necessarily have to be black.
Pero no tiene por qué gustarte.
But you don't have to like it.
— Indiana Jones y la última cruzada (1989)
There's no need to worry.
Ella no tiene por qué saberlo.
She doesn't need to know.