Were you pes A-E before medically graded to pes F?
If yes, you have to wait between 2-4 weeks for the medical board
to process your pes F before getting a letter. Sometimes it may
take 1-3 months for it to process finish too. You'll get a green
certificate that states you're exempted from:
A) Full time national service.
B) Operationally ready national service.
C) Duty to obtain an exit permit.