Years ago, some Spanish flight school students that I knew had a similar problem at a major aviation academy. What they did was see a Notary Public for an authentification (under oath) that the flight times were true and correct. Then they went to the State level (at the state capital), for the Justice Department to certify (another rubber stamp) that the Notary Public is authorized to administer oaths and registered with the state.
This is known as a Chain Authentication, one rubber stamp certifying that the lower level one is authentic. I don't know how far the Qataris want to go on this, but if you want to cross all your T's and dot all the I's, then a full Chain Authentification (which I've done for another legal matter separate of aviation) goes like this. After the State authenicates (rubber stamps) the Notary's stamp, you go to the US State Department, which authenicates (rubber stamps) the State's stamp. At this point most foreign authorities should recognize the US State Department seal, and accept it. If not, then the US Embassy in Qatar will autheniticate the US State Department's one, and possibly, the Qatari equivalent of a Foreign Affairs department will authenticate the US Embassy's seal. At this point an Qatari government agency should accept the document, since it has gone through the chain authentication.
Is this absolutely necessary? Probably (hopefully) not-- hopefully someone with experience at Qatar Airways will answer, however I mention it as a last option and also as reference for any future use.
Read more here:
http://www.apostille.us/faq/_what_is...tication.shtml