We moved house two years ago and are still receiving post for the previous owners, not just the odd letter or Christmas card but screwfix catalogues, notices from companies house (wtf - why would you not change your address with them), and the NHS. I'd make the effort to locate them on Facebook but they were awful vendors to us and I'd rather not have any direct contact with them. They left the place filthy, left furniture there which we had to dispose of and the whole downstairs was covered in mouse droppings (vom) which hadn't been apparent when we viewed the property. We had to get the place deep cleaned and treated for rodents the day after we moved in. With a 2-year old and a 2-week old (not sure how they put up with all this with their 4-year old - double vom). As a result we don't exactly have amicable feelings towards them.
I've dutifully "returned to sender" with most of their post but we received a couple of parcels just before christmas with no return address on it. (As sn aside, who the hell sends a parcel with no return address on these days?!) What do I do with these parcels? I think they may still live locally as I used to see the wife around a couple of times when we first moved in but havent seen her in over a year.