Imposters claiming to be employees of the Sacramento Municipal Utility District are asking for access to a would-be victim's home in Elk Grove.
SMUD says there have been two confirmed cases where imposters have tried to enter homes.
Capra says employees wear badges when they are in the field.
The City of Roseville warns of a similar scam in which a woman has gained access to a home by claiming to be with the animal control department.
While she investigates what she says is an invasive snake colony in the backyard, an accomplice steals items from the home.