Residents in Ceredigion are being warned to be vigilant after an elderly resident was contacted as part of a council tax scam.
Ceredigion council said fraudsters had telephoned asking for information about the person's bank account.
The bogus caller claimed the victim's council tax account was in credit and private details were needed in order to repay the money.
The council urged residents not to divulge their bank account details.
A council spokesman said: "The scam involves the caller claiming the council tax payer has a credit balance and that the council wishes to refund it.
"The caller proceeds to ask for the council tax payer's bank account details in order to arrange repayment of the credit balance.
"Ceredigion County Council warns that residents should please beware of such calls and never divulge their bank account details over the telephone in this way."
People who think they have been contacted by a bogus caller can phone the local authority on 01970 617911.