Tiedi, who works as a driver for the Italian luxury goods company, Tod's, found the cash in a bag in the car park of a shopping centre in Civitanova Marche, Today.it reported.
“I burst into tears when I returned it to its owner,” Tiedi said.
“It didn't belong to me, that's why I gave it back. He wanted to give me a reward, but I did not accept.”
The money belonged to a businessman in the area, who dropped the bag as he got out of his car before going into the shopping centre.
He had planned to deposit the money into a safe after the shopping trip.
Tidei spotted the bag, which also contained a mobile phone and other documents, lying underneath the car.
“My legs were shaking,” he said.
“But I didn't think twice. Amongst all this money I found documents with his address on.”
While some people might have been tempted to keep the cash - especially over the Christmas shopping period - Tidei was philosophical about his good deed.
“In life, you have to do good,” he said.
“Evil is unnecessary. €43,000 doesn't change your life, but a beautiful deed does.”