Fathwa, - Is it obligatory to cover the area under the chin?

Question:
I read that some scholars say that covering the chin and under it is
fardh, but some say because of its difficulty it is not. I have
difficulty wearing my hijab so that it covers my chin, also my cheeks
are really full and when I wear it in that manner I feel very insecure
as it draws more attention to them (I am in the time of meeting
potential husbands!) so can I wear hijab and just pin it under my
chin? I would be covering everything except for the part right under
my chin.
Answer:
Walaikum assalam,
I asked Mufti Mahmoud Ashraf Usmani about this last year: He said that the
scholars do not emphasize that the area under the chin is necessarily
from the awrah that must be covered, because of the difficulty of
covering it (and the wide hardship in insisting on such a ruling).
Others, however, emphasize it strongly.
I had asked Shaykh Adib al-Kallas about this a few years ago. He said
that the area should be covered, but because it is small in area, and
only little of it is generally visible from the sides, it would not
invalidate the prayer if left uncovered.
And Allah knows best, and He alone gives success.
Wassalam,