In case that you are purchasing a property off-plan, i.e. a property that has not been completed yet, you will be registered in the so-called Interim Real Estate Register kept by the Dubai Land Department. The proof of such registration is called Oqood. Once the property has been completed or if you buy a finished property, you will be entered as owner of the property in the Real Estate Register. Based on such entry, you will receive a title deed. With Oqood and the title deed, respectively, you can prove your rights to a property.
