A letter from your employer will be useless if they no longer exist .
A letter from your bank more like , saying they are happy with yr employment situation and ability to pay off the pile of dirhams you owe them.
Smacks of the old days in Kenya when you had to get Clearance from the Tax authorities to go on holiday even if you paid by PAYE!! After 5 days of nause , used to give up and head off to the coast , thereby saving shed loads of dosh which I could then give to the Tax man !!