1. Visit your local Police Department and ask them to give you a letter mentioning that (your name) is a resident of (your address). He/She is a person of good social standing and has no criminal or other police records. Then have them stamp and sign it.

2. Send this letter to the closest Qatar Embassy in your country with a request to "Legalize" the document. The cost of legalization and mailing procedures are usually mentioned on the website. You could also call them up.

3. If you are mailing your police certificate to the embassy (as opposed to hand delivering), you should include a pre-paid return envelope along with your request. That way, they will mail it back to you immediately after legalization.

4. you can then fax this doc to your sponsor in Qatar for processing of your work permit.

That is all there is to it...for what I know.