While you can draft your own rent agreement, simply writing it on A4 paper and signing it won't make it legally valid for future disputes. Rent agreements must be executed on appropriate stamp paper, with the value determined by state stamp acts and often based on the annual rent. Agreements longer than 11 months require compulsory registration, though many opt for 11-month terms to avoid this. Sub-registrar offices are operational for registration, and online options may be available, even for notarised agreements.