1. Deadline
Registration must be done within 30 days of signing (or of the start date, if earlier).
2. RLI form
You use the Revenue Agency's RLI form, online via the telematic services or at an office/tax centre.
3. Who pays
Registration tax is split equally between the parties, while stamp duty is paid by the tenant unless otherwise agreed (art. 8, Law 392/1978). With the flat-tax (cedolare secca) option neither registration tax nor stamp duty is due.
4. What you need
Details of the parties, the property's cadastral details, a copy of the signed contract and the references to pay the taxes.
5. After registration
Keep the registration receipt: it's proof the contract is in order. Registration is usually the landlord's responsibility.
Informational material by casaperstudenti.it: it is not legal advice. For your specific case, consult a qualified professional.