Return to Sender

Firstly.. BRILLIANT project! Top marks to Julie for setting us this.. got me right back into the swing of things.
We had to send out as many postcards as we liked, but the catch was they had to be returned to us, without us actually including the return address on it. We had to think of visual ways of conveying the address.
Below are some of the examples I did.. So far i've had 2 back.