Dear Clostermann,
Your plan will work if you are returning from home to DOH for work, but I feel sad when I hear about a these pilots who tried to leave DOH on their annual leave and lose few days trying to board a plane.
I still think that we sheould get a "non dodgy" clear official letter recently dated and sign by a the CEO, Ground Handling Manager or EVAPO to have in our hands to avoid any problems.