By advertising and viewing as early as possible, this allows prospective tenants sufficient time to give notice for any existing tenancy and be read to move in on or very close to the fit to let date. For MMR properties, for example, RSLs may add alert systems to their websites to notify prospective tenants when a property matching their desired criteria is advised, which allows tenants to give notice for their existing tenancies as soon as possible and be ready to move in on target dates. 4.