Post office worker Georgia hands in parcel containing $100,000, by AAP.

POLICE have praised an Australia Post worker who handed in a parcel containing $100,000 she found behind a post office in Melbourne's south-east.

Police say the woman, known only as Georgia, found the parcel yesterday propped up against a door behind a strip of Clayton South shops about 4.40pm (AEDT).

Georgia today said the package was daubed with $50 signs and, without opening it, she called police before taking it to the Springvale Police Station.

Written on the bag were the CBA (Commonwealth Bank of Australia) initials, which also has a branch at the Clayton South shopping centre.

"I didn't want to know what was inside it," Georgia said.

Constable Mike Hannie said the money was inside an ATM cash cartridge full of $50 notes.

"I think Georgia has done a fantastic job and it's great to see someone in the community is doing the right thing," Const Hannie said.

Georgia is hoping her luck comes in threes because she collected $4500 in a trifecta on the Melbourne Cup and police think she deserves a reward for her efforts yesterday.