Hi Giulia,
If you want to add a tenant to an ongoing tenancy, you can do this via a deed of assignment or you can begin a new tenancy with both the tenants as signatories.
Adding a new tenant to an ongoing tenancy via assignment isn’t something that we (or anyone else) have built an automated system for. The deed would need to be properly drafted, signed by all parties and witnessed. It’s is often more straightforward to simply begin a new tenancy.
I’ts very easy to initiate a deposit return via your scheme’s website, and OpenRent handles the registering of the new deposit for all parties anyway, so it isn’t that much more admin just to create a new tenancy.
If you have any questions about this, you can email the above address for more help.
Sam