It depends on whether you have actually signed a new tenancy agreement. It sounds like outgoing tenants may just have signed what is known as a deed of assignment, which basically says that the tenants have changed. However, your landlord or letting agent should inform us of any changes to the names of tenants registered at the address and when it comes to the return of the deposit we can only deal with the lead tenant, who seems to have since moved on. We will need to update the tenancy information so please contact a my|deposits adviser on 0844 980 0290 to discuss the matter. We also have guidance on our website about deposits for joint and several tenancy agreements, which may also be useful. Unfortunately I cannot post links yet so please visit mydeposits.co.uk and visit the tenant's guide section.