Well you can trace people and take them to court, but unless you are prepared to go and kick their door in I really wouldn't bother as they'll turn up at court, deny everything and when it's found against them plead poverty and offer to pay you about �5.00 per week, which they will then not pay etc etc etc... you get the idea. Lots of hassle for not much back. Much better to either try the door kicking (lol) or better still take it as a lesson and just learn from your mistake.
As a landlord, I always arrange to have someone call to collect the rent in person every week or month unless it's via the DSS in which case I insist it's paid directly to me by the DSS, as if someone calls regularly it's
a. useful to you because you can get an idea if the property is being looked after
b. it's harder for people to dodge paying face to face as
a direct debit is easy to ignore or explain away as a bank error or something and before you know it they are 2 or 3 months behind.
I'd just take your first loss on this I'm afraid.