The NFU said con artists have been contacting farmers to warn them their account has been compromised and advising them to contact their bank to transfer their money out of the account.
The victim is asked to phone the bank using the published number on the back of their debit card to confirm that the call is genuine. The fraudster holds the line open in order to intercept this call.
They are then asked to provide internet banking log-in credentials, customer numbers, passwords or card and reader codes to transfer the money to another account. In reality the fraudsters transfer the money into their account.
NFU Lancashire county adviser Adam Briggs said: “The NFU is in contact with the banks and police about this issue. If you are contacted by somebody claiming to be from your bank, always call your bank back on a different line.
“Any NFU members concerned about this scam or fearful they may have been a victim should contact NFU Call First on 0870 845 8458.”
Earlier this month police in Nottingham warned of a phone scam where farmers were being asked to send money to apparently target youth crime.