The tenant must request authorization by registered letter with acknowledgement of receipt. The sub-tenant has the right to be kept in the premises, even if the tenant leaves the accommodation.

We do not place signs without authorization. Of course, that would be not only wrong, but counter-productive. Letter: Volunteers for Rocky Anderson’s mayoral campaign: ... her co-tenants.

The Trump administration’s letter to Harvard University threatening financial ruin if it does not agree to a list of demands was sent by an official “without authorization,” according to a ...