This happens quite a lot to me
and there have been opinion divided as to opening them and saying that it is not you
I usually which is quite true of course say they have been opened by the kids
but if you dont - you risk having the bailiffs around - when as crapatcryptics says you have to show them you are you -and I have had that as well
Remember that you as John Smith cannot be made responsible to the previous tenants debts
Dont worry about debt collectors - No 1 is a shock and thereafter it is a case of ' o you again - who do you want this time ? '
Being impersonated is more of an issue