A Fairfield woman who parked her car on Sasco Hill Road the evening of July 3 and walked to Sasco Beach to watch the town of Westport's fireworks had an unwelcome surprise when she returned to her car.

It wasn't a ticket from police, but a plastic bag placed on her windshield that contained four computer printout photographs of her Subaru Outback -- two showing the front, two showing the back of the car -- and a sheet of white paper on which the words, "No Parking Please" was printed in large letters, along with the date, time and the Sasco Hill address of the person who presumably left the bag.

Parking on Sasco Hill Road is permitted, and the road, which includes homes valued at more than $10 million, is sometimes lined with overflow cars from events at the Country Club of Fairfield, which is near the spot where the woman had parked.

The woman, who provided the materials to the Fairfield Citizen on condition that she not be publicly identified, had parked on the street because the beach parking lot was already full.

Lt. James Perez, who heads up the Police Department's Special Services Division, said this week he hadn't heard of anyone else who received a similar "no parking" package, but said whoever did it was in the wrong. "No one in the community should be taking matters into their own hands," he said. "If there are no signs anywhere posted, as long as the car is legally registered, they can be there."

Perez said one of the problems with what he termed "vigilantism" is that the response is unknown. "You never know who you're going to confront and that person may not be willing to just talk," he said. "We have appropriate training in dealing with that."

The person who placed the bag under the Subaru's windshield wiper also shouldn't be touching other people's property, he said.

Perez said residents who have complaints about parking, traffic and road signs should let his division know and that the Police Department's website, accessible through the town's website -- www.fairfieldct.org -- has a neighborhood petition form for matters related to parking, speeding and intersection controls.

A decision to designate "No Parking" areas is up to the Police Commission, Perez said. "We have an entire mechanism to be able to adjudicate any of those complaints, whether perceived or real," he said.

The person who left the bag didn't include a name, but the address was for a nearby Sasco Hill mansion. Attempts to reach the resident of the home were unsuccessful.