It depends on your Prefecture, the procedure is on their website.
For mine, the forms are on the website, and the list of documents required.
They normally only respond to emails when you are responding to their email. Calls are waste of time.
I wondered about mailing the real documents and decided I did not want to.
As long as you get proof of contact with them like an appointment email you are safe.
My time was up 6 days after my last OFII appointment (health check) which took 6 months to get, was after the end of my visa. So as soon as passed, I got the appointment on the Precfecture's website. And they emailed the appointment confirmation so I was safe for the 2 weeks.
Everything must be copied onto A4-sized paper on one side only. It must be in the exact order of the list. They scan it all later.
I made an appointment on the Prefecture's website. It was for 15 mins, to see your Face and ID and Deliver the file.
"NO STAPLES in any paper" My file was very thick so I paper-clipped all the documents of each section together. Which made it easy for them.
I put my Passport and Appointment email on top of the File. I had the file all in a folder in the correct order so as not to have it become out of order and easy to pass around the partition.
The person was very happy with that and it all went very well. They only have 15 min. Have the Passport Photos with you but they only took one and used it for my receipt.
I had the tax stamp but it was not required for this visit. It will be at the next one. You will get the receipt and they will give an estimate of time before they will text you mine 3 to 6 months
So make sure you give them all the ways to reach you. on an A4 paper. Typed not written or spoken.
And Photocopies of each page of the passport even blanks and include the first empty page of the Green Family Book. They believe the book.
Any time you have a face to face have all the originals documents with you. They said that was the biggest reason for trouble after Staples.
I learned it all the hard way.
Next week I go for the next meeting with all the originals, tax stamps and photos the appointment is for 4 mins. And I will find out how long I get before doing it all again.
They say do not come early but I am in sight of the door for 30 mins and late is, you missed. It is a long trip.
If you want to do it by mail. You send them the Application form filled out, and good photocopies of the requested documents. The same way you would hand them in.
You will be in for a face-to-face later with any document they want to see. I always have them all in order for the current form in my school bag. I do not like going home without what I want.
Good luck - Before Covid-19 they were not as friendly as they have been this year.
And always a Mask. When they look at the passport I gave them a flash of my face. It is fun to make them smile. The call to the window was right on time and almost not understandable. And security at the door was slow. So a little early was good. And every renewal has a fee and they will tell you how much before the appointment.