A car was damaged with scratches to the paintwork after being parked outside a house in Pioneer Avenue, Burton Latimer.
The crime happened between 3pm and 3.10pm on Thursday, 24 September.
After parking her blue Mini Countryman, the victim was involved in an argument with a delivery driver.
About 10 minutes later, the woman returned to her car to find scratches along the nearside front and back doors and on the back bumper.
Witnesses, or anyone with information, are asked to call Northamptonshire Police on 101.
Alternatively, they can call the independent charity Crimestoppers anonymously on 0800 555 111 or use the anonymous online form at www.crimestoppers-uk.org.