Waikato retirement village residents are being warned of a scam where strangers knock on doors pretending to be from the local district health board.
Once inside, the door-knockers ask to inspect all medication stored in the resident's unit - a practice the Waikato DHB doesn't do.
Reports of the scam have so far been reported in Hamilton and Matamata retirement villages but the Retirement Villages Association fears it will spread.
The association believes the door-knockers are attempting to access pharmaceuticals which might be close to or past their use-by date.
Fraud education manager for the Commission for Financial Capability (CFFC) Bronwyn Groot said residents should ask for proof of identity when answering the door.