They can vary from 2 to 20 documents and are available from a large number of sources, especially on the Internet. If there is an oral agreement, the changes are also oral, although the only proof you have to change is that a different amount of rent is paid each month by the tenant to the landlord. One of the major problems with signing an act is the need to have the signature of someone who is not a contracting party attested. The main difference between an „Assured Shorthold Tenancy Agreement“ and an „Assured Tenancy“ is the legal procedure that the owner must undertake to repossess the property. Do NOT use ASA if you have a secure rental agreement. The agreement may also contain details about your landlord`s obligations for repairing the property. .