French phrase
Quels ~ faut-il pour souscrire ?
Meaning
What ___ are required to sign up?
When to use it
Asks which documents are needed to join. It is somewhat formal and used when requesting proof.
Example dialogue
Je veux souscrire à la mutuelle étudiante.
I want to sign up for the student health insurance plan.
Quels justificatifs faut-il pour souscrire ?
What documents are required to sign up?