The ECFMG no longer mail the scheduling permit, you only get it from OASIS and you have to print it out and take it with you to the Prometric center.
As long as you have a scheduling permit then that's it you can go and take the exam and you don't need to wait for Diploma verification.
As long as you have a scheduling permit then that's it you can go and take the exam and you don't need to wait for Diploma verification.