My son let's call him Tom and his friend lets call him Bill rented a flat as students for a year from a private landlord. Their tenancy completed about 5 weeks ago. We have been trying to contact the landlord to recover the deposit. We have tried to search on all 3 tenancy deposit schemes and cannot find any trace of it being protected. Also he did not provide incoming or outgoing inventory. He did not provide his contact address. All we have is his mobile no and email address and the bank account details where they have been paying the rent. The last few text messages he claimed to be very ill and in hospital. This has all the hallmarks of a fraudulent landlord. My question is how do we bring a small claims against him if we do not have his address?