These are the steps to transfer a bond which is held in trust to a new tenancy.

1.  Refund previous tenants bond
Open the previous tenancy, select Bonds on the left menu, click the menu to the right of the bond and select Prepare to refund - refund the full amount to the tenancy ledger.
2.  Tenancy Ledger Transfer
Set up a Tenancy Ledger for the new tenancy and transfer the funds from the previous tenancy ledger to the new.

3.  Raise new tenants bond invoice for the amount being transferred
Do this the same as normal, from the Bonds page of the new Tenancy.

4.  Apply Funds from Tenancy Ledger to Invoice

Use the option on the Tenancy Ledger page to apply the funds to the new bond invoice.