The Department for Work and Pensions (DWP) has issued a warning as it may ask for proof of identification when dealing with customers.
The government department is responsible for distributing benefits and handling pensions, among other things. On Tuesday, a tweet from the DWP's official account urged people to be vigilant.
DWP said: "Be fraud aware and protect your personal details at all times Your information could be used by criminals to commit benefit and other fraud".