Police in Westport are warning residents of scammers posing as sanitation workers in an effort to score holiday tips.

Police say the scam involves letters placed inside mailboxes stating they're from "Your Garbage Men."

The letters contain a holiday greeting and return envelope with an out-of-town address.

"It did not have the name of a sanitation company," Lt. Eric Woods said. "It just had an address in West Haven that we've looked into and have identified as an apartment building."

The owner of Malone's Refuse Service, one of several sanitation companies that services Westport, says the company received a few hundred phone calls and emails from concerned clients since Friday.

"This is the first year this has ever happened," owner Susan Malone said. "And I was a little taken back by it."

Malone says the company has since emailed clients and posted to social media warning the letters aren't legitimate.

"An elderly gentleman came here and said, 'I'm so glad you put that on Facebook because I would have been naïve and fallen for it,'" Malone said.

Police say there have been no reports of anyone falling victim at this time.

"Something we recommend you do, hand-deliver any gratuity or tip to any of your workers or people you want to give money to during the holiday season," Woods said.