Police have launched an appeal for information after an 83-year-old woman from Westcliff was conned.
Suspects knocked at a property in Fairfax Drive at around 2pm on August 20, and offered to carry out work to her garden.
They then convinced the victim that they needed to hire a skip and asked her to pay using a remote cash machine.
She entered her PIN number and left the scene with the bank card before later withdrawing a three-figure sum of cash.
The rogue tree surgeons claimed to be working for a company named Willow Tree and Gardening Services – but police believe this to be a fake firm.
They also attempted other larger transactions.
Investigating officer DC Iain White, of Southend CID, said: “The suspects claimed to be working on behalf of a company called Willow Tree and Gardening Services but we believe this to be a bogus company.
“They have then distracted an elderly member of our community by claiming to have a remote banking machine.
“We believe that this allowed the suspects to gain access to her PIN number and access to her cash.
Alternatively, to report information anonymously online, visit https://crimestoppers-uk.org/give-information/give-information-online/
For more information or advice about bogus callers, visit https://www.essex.police.uk/advice/bogus-callers/.