How about a system where i check the address of every letter I get on google maps.

If the address is to the left of me then I pass the letter to my left neighbor, if its to the right, then I pass the letter to my right neighbor.

If the letter was posted more than 2 weeks ago I put it in the bin

If the address on the letter is corrupted then I also put it in the bin.

What do ya reckon?