Fly-tippers struck in Winchelsea last week throwing a pile of domestic rubbish over the wall of a field opposite the public toilets in Monks Walk.
The incident was reported to the National Trust, to whom the field belongs. Police were called and, when they inspected the rubbish, found several letters with the same address.
A spokesman for Winchelsea Neighbourhood Watch said:“We will be watching closely to see if the police,or Rother District Council, follow this clue up.
“It is always possible that the addressee of the letters is not involved, but we may have a chance here to prosecute a fly-tipper and deter others”.
The fly-tipping at Winchelsea follows another recent incident where animal parts were found dumped in a bag at Stubb Lane, Brede.
Rother was named one of the worst places for fly-tipping in the South East in recent years but the situation has improved since then following a number of high profile prosecutions brought by Rother District Council.
The council has warned that those caught fly-tipping face a heavy fine.