For AP, typically takes 90 days. For me, It took two weeks cause i requested to expedite by writing a letter and calling after a week of receipt notice. My grandmother was 92 and ailing. From what I have heard and seen, it depends on who will be reviewing your request. I wasn't asked to provide any documentation. If you have a medical emegency, be sure to include it in the AP request. Write the word "EXPEDITE" on top right of first page of i-131 form. Include the request as cover letter.