On Wed, 31 Jul 2013 18:57:16 +0100, Phil L wrote:

Do you have the authority to have new keys cut for your front
door? If
not then neither would the previous tenant and you should be able
to
find out from the landlord just how many keys have been authorised
for
your lock. If that matches the number you have, you don't have a
problem.

Authority?

Quite. The paper says it's so, so it is. That's the basis of the
horse meat scandle, the logging one and no doubt numerous others.

Who could stop anyone who held the key in the past, from having multiple
copies made?

That depends a bit on the type of key at least as far as going to a
locksmith is concerned. These DPS locks may be tricky to get
duplicate keys made. But probably not impossible if you have a good
story and a not 100% straight lock smith.

--
Cheers
Dave.