During the past three weeks, police have received reports of seven similar incidents across the city.
The carparks targeted include the Range on Water lane, Southernhay east, Waitrose and Sainsburys on Alphington Road.
A smartly dressed man is targeting lone older women and men, pretending he needs change for the ticket machine.
So far, around one-thousand pounds has been stolen.
Totnes school fire treated as arson
Investigations continue
Topsham residents fight two-year housing plan
Hundreds turn out
Fawlty Towers breaks records at Devon Theatre
Westend hit packs out venue
Okehampton Lidl plans thrown out
It would be too damaging for the high street
Man attacked by two strangers in Plymouth
Suspects flee the scene
Swimmer running Marathon for Devon lifeguards
"I thought wouldn't make it"
