Missing Sydney businesswoman Melissa Caddick has been found months after her disappearance.

Campers on the NSW south coast found her remains over the weekend, with DNA confirming that it was her.

She was last seen in her Dover Heights home on November 11th 2020.

She was being investigated by ASIC before her disappearance and was accused of meticulously and systematically deceiving investors who trusted her with millions of dollars over several years.

Assistant Commissioner Michael Willing said campers found a running shoe on Bournda Beach, south of Tathra, on Sunday to 7NEWS.

“Within that shoe, were the remains of a human foot,” Willing told reporters on Friday, adding the foot and shoe matched the size and description of a shoe that Caddick had been wearing before she disappeared.

“DNA from the foot was last night matched to DNA sample from Melissa Caddick’s toothbrush and family members.”

“I can say that exactly how Melissa came to enter the water is still a mystery,” he said.

“Police have always kept an open mind in relation to what the circumstances were for her disappearance, including the fact that Melissa may have taken her own life.

“However, a definitive decision in relation to the manner, time and cause of death is a matter for the coroner.”

Caddick's family was told of the development on Thursday night.

“They are obviously very distressed and her wider family members are very distressed as well,” Willing said.

Court-appointed liquidators earlier in the week looked over thousands of documents and interviewed family members, business associates and investors of Caddick.

Investors “were working on the basis that they trusted Melissa and that they could trust that she was going to invest their money prudently and diligently,” provisional liquidator Bruce Gleeson told reporters on Wednesday.

“Unfortunately that hasn’t happened.”

She provided investors with hundreds of documents on Commonwealth and CommSex letterheads that suggested investors were profiting off their investments and used the money instead to fund an "extravagant lifestyle".

Liquidators have been unable to find the account numbers listed on the documents or have discovered that the account numbers were not with the actual investor.