We moved into a rented house in August, and in the first week we had a couple of official-looking letters for the previous tenants. I held on to them, intending to get the forwarding address from the landlady, but a few days later the old tenant came to the door to pick up the post and give us their new address (in a different city). I said I'd forward on anything that came for them.
I guess I expected that after a month or so, they'd have updated their new addresses, but these letters are still coming weekly for them, and I'm still dutifully scribbling "please forward" on the envelopes with the new address. AIBU to decide that enough is enough? Should I write something else on the envelopes or just start returning to sender?