No, Qatar is NOT a member of Hague Apostille Convention. This always creates confusion. Therefore, there is no obtaining an Apostille. You will need a full attestation process which contains different stages of verification by different departmentsand finally end with attestation from the Qatar Embassy in your home country (i.e. India) and then attestation from the Ministry of Foreign Affairs (MOFA) in Qatar.

The most commonly testified records of Qatar can be divided into three categories:
Educational Documents: Certificates of the degree, certificate of the diploma, marks sheet/transcripts. They are usually needed when working on Qatar employment visa, professional registration (e.g. doctor, engineers)or additional education.
Personal File: Birth Certificates, marriage certificates, Police Clearance Certificate(PCC), experience Certificate. Such are usually required in case of Qatar family visas, residency or specific job application.
Commercial Documents: the power of attorney, Memorandum of Association (MOA), trade licenses. These play a critical role in setting up businesses and operating the businesses based in Qatar.

There are a number of steps involved in the general procedure of attestation in Qatar, beginning in the issuing state/region (in this case Tamil Nadu): First Verification This will typically begin with a Notary Public.
State-Level Attestation:Under Educational records: However, Educational documents require Human Resource Department (HRD) Attestation of the state of origin of the certificate (e.g., Tamil Nadu HRD Attestation).
In case of Personal documents: Home department or Sub-Divisional Magistrate (SDM). Commercial documents: Chamber of Commerce concerned.
Ministry of External Affairs (MEA) Attestation: Attestation done by the ministry of external affairs which is part of the central government of the country where you take the exam (MEA India Attestation).
Qatar Embassy Attestation: The Qatar Embassy or the Consulate of Qatar, in your home country (usually in New Delhi, India) attests the concerned document.
Ministry of Foreign Affairs (MOFA) Attestation (in Qatar): To have the document completely accepted in the country, you are required to carry out this process once you arrive in Qatar where the document is checked by the authorities there once again (MOFA Qatar Attestation).

The attestation process time in Qatar is quite variableand could take a few weeks, several weeks or even a month or longer for some documents. Some of the things that can delay attestation are: Type of Document: Educational documents usually take longer because there are additional checks by universities/HRD. Issuing Authority: Some state departments or universities may take significant time to process your attestation from their side. Integrity of Document: If your documents have discrepancies and errorsor issues with original document like lamination or poor condition, delays and sometimes rejection may occur. Government Workload: The busy time of year, holidays or unexpected administrative backlogs can also impact processing times.