A medical certificate from a home visit is legitimate sick-leave evidence in the UAE provided the issuing doctor is licensed by the relevant authority, DHA in Dubai, DoH in Abu Dhabi, MOHAP in the northern emirates, and the certificate carries the doctor's name, licence number, the facility details, dates of unfitness and a stamp. Under UAE labour law, private-sector employees are entitled to sick leave supported by a medical certificate, so the note has real legal weight; it is not a courtesy letter.
The operational detail people miss: say you need the certificate during the visit, not by message two days later. Backdating is a licensing violation, and a doctor can only certify the period they can clinically justify from that day's examination. For a standard flu or gastro case, expect a note covering one to three days with a review if symptoms persist. Longer absences typically require reassessment, and some employers, particularly government-linked ones, require certificates for extended leave to be attested through the health authority; confirm your HR's threshold before assuming.