Senior citizen lady has demat account and want to remat some stocks

An elderly lady who is senior citizen has a demat account and wants to remat some shares ..( she has reasons and I dont want to get in to argument right now) ... So my question is once she send it to our broker ...how many days it will take to receive those physical certificates? and do they use registered post (so that her physical presence and signature is required?) I am asking about this is because she might have to go abroad..and her residential address at broker might be rented out and she does not trust her tenants to receive the delivery. Can she have those certificates delivered at her daugthers' addres or its law that those certificates can not be delivered other than her residential address with broker?