The educational and marriage certificates should be attested from Indian Embassy (or from delhi, may be now changed) and later attested from Qatar Ministry of Foreign Affairs (Its located behind of Al Bustan Hotel in Muglina) There is no requirement of your wifes educational certificates instead yours should be submitted. Your electricity Bill / or House Contract is required other than your six months bank statement and copies of passports for both and copy of your ID.

Moreover, you will have to submit all these documents along with no objection letter from your sponser showing your designation and salary. I think till will be enough. If you have any problem or question contact your office PRO I hope he can assist you.

Best of Luck!!!!