A NSW mother has been left distressed after two people pretending to be child protection caseworkers visited her home to "check" on her twin babies.
Police and the Department of Family and Community Services on Wednesday issued a warning following the reported visit near Queanbeyan late last week.
A man and woman allegedly used fake IDs and claimed they were there to check on the six-month-old twins' welfare.
They waited in the lounge room while the infants woke up from an afternoon nap. They left after checking them and their bedroom.
The mother became suspicious and contacted the department, who had no record of the visit. It was then reported to police.
Detective Chief Inspector Neil Grey from Monaro Local Area Command said police were not yet sure of the pair's motivation.
"Anything that involves children is always a concern," Det Chief Insp Grey told AAP.
"She (the mother) is fairly upset and she believes the inquiry was legitimate".
The family of five had no known interaction with FACS or police and there had been no other reports of similar events.
Investigators urged anyone with information to come forward.
The woman, believed to be in her 20s with tanned skin and medium-length curly hair, was wearing an orange blazer and dark-coloured skirt
The man was described as Caucasian, in his 30s, with short dark hair, a prominent nose, and was dressed in a business shirt and trousers.
