Certificates of Good Conduct (also called Police Clearance Certificates) can be obtained from Dubai Police within 2-3 working days for residents within the country.   

For citizens and residents inside the UAE:

The applicant’s fingerprints are taken.
Obtaining the document takes between 48 and 72 hours.

For citizens and residents outside the UAE:

Required documents:

• A copy of the applicant’s passport.
• A copy of the old passport provided that the previous residence is fixed in it.
• A card showing the applicant’s ten fingerprints on the official form issued by the competent authority – Police – in the country of residence. The card should be attested by the UAE embassy in the resident’s country and by the office of the UAE Ministry of Foreign Affairs.
• The applicant or one acting on his behalf should submit the documents.