The RTB2 form is the notice that a council sends to a tenant who has applied to buy their home through the Right to Buy scheme.
Once your landlord has received your completed application, they need to confirm whether you and your property are eligible. They will confirm this by sending you a RTB2 notice.
They have up to 4 weeks to do this, or 8 weeks if you have been with your current landlord for less than 3 years.
See the Right to Buy website for more information.