New claim Schapelle Corby was set up

New evidence has reportedly emerged in the case of convicted Australian drug smuggler Schapelle Corby, with a claim marijuana found in her luggage may have been planted by a rogue baggage handler.

Corby is serving 20 years at Indonesia's Kerobokan jail after being caught with more than 4kg of the drug at Denpasar Airport on October 8, 2004.

Almost seven years after the conviction, a woman has come forward saying she believes Corby could have been set up.

The woman, who spoke under the condition of anonymity and used the alias "Sue", claimed she dated a Brisbane Airport baggage handler for a short period who had a colleague who in October 2004 went to work with a large bag of marijuana.

"When the supervisor was coming down the guy panicked," Sue told the Nine Network on Thursday.

"And the first thing he did was look for somewhere to hide it. And he grabbed one of the bags that was behind him and hid it there.

"When he was talking about a big bag, he meant a big bag."

It remains unclear if Indonesian or Australian authorities will pay any attention to the claim.

Sue said she had come forward now because of her conscience.

"What if she is really innocent and she has to do 20 years? What if she doesn't make the 20 years?" she added.

Sue said she used to work as a clinical counsellor in north Queensland and signed a statutory declaration regarding her claims for the Nine Network.

She said she was happy to co-operate with police and could give them the name of one of the men allegedly involved.

Corby's Australian lawyer Kerry Smith-Douglas described Sue's statutory declaration as "extremely important".

It's not the first time claims have emerged about baggage handlers planting marijuana in Corby's bags.

In 2008 unionists demanded a public apology over an "outrageous allegation" that Australian baggage handlers tampered with Corby's luggage.

Corby's former lawyer Robin Tampoe later admitted he made up the theory after hearing a talkback program where callers were discussing alleged corruption among airport staff.

-AAP