You should verify that prospective tenants have valid documentation (e.g., passport, employment pass, or IC) confirming they can legally remain in Singapore. Ensure they fulfill the minimum stay requirements (for private properties, this is at least 3 consecutive months) and that the total number of occupants does not exceed what the relevant regulations allow. If it is an HDB flat, you must also ensure the tenants meet HDB’s eligibility and do not breach any subletting rules.
