A friend of mine faced this situation last november with doha bank. He paid all the debts on the Credit card but he couldn't withdraw the rest of his salary cause he had to wait untill the clearance report is issued. and at the same time he couldn't wait 45 days to get his money cause he had to leave the country for good the next day..
So, i went with him to the bank, made me a procuration letter to allow me to recieve his money instead of him and he left the country the next day. and when the clearance report is issued i went to the bank recieved the money and the report and sent it to him.
So the bottom line here is that u can leave the country, but if u still have money at the bank or if u want to get the clearance letter u need to do procuration request letter to a trusted friend of yours to recieve them on your behalf..