Ellie Newman, 36, who lives in Whitefield and sibling Jordana Timeyin, 39, from Prestwich, leave their cars on a street near to their work offices in Whitefield.
The women, who own individual Range Rovers Velars in black and white, say notes have been left attached to both cars on several occasions, according to Manchester Evening News.
On Thursday, Ellie claims she finished her shift at Loan Agency Bridgewater Acceptances, the same place her sister works, to discover a message stuck with silicone on the front window of her vehicle.
The note in black felt tip pen read: “Please stop using this street as a car park.
“Residents are coming home from work/shopping and can not park on their own street!!”
But Ellie said she and sister Jordana are perfectly within their rights to park there, as they both pay tax.
She said: “There are no yellow lines.
“We work in the area and this is what we pay road tax for.
“Our offices have been there 20 years.
“This has happened about four times.
“We have had our car scratched and around four notes left, stuck on with super glue, gaffer tape and now silicone.
“This is criminal damage.”
Friend and colleague Rachel Shard, 41, said she used to park her own vehicle on another nearby street, but also suffered vandalism.
She said: “It was costing me to get my car repaired so I won’t park here anymore.
“I think it is jealousy.”
Ellie says she has logged the incident to the police online.
According to the official RAC parking guide: “It is perfectly legal to park outside someone’s house, unless the vehicle is blocking a driveway or a wheel is over a dropped kerb.
“Other situations in which parking isn’t permitted include streets governed by residents’ parking permits or any of the restrictions outlined above, i.e. double yellow lines.”
Greater Manchester Police have been contacted for comment.