Mr Fyfe said he had "washed my hands" of the item, but the office decided to give it to the Million Dollar Mouse campaign, which aims to eradicate mice from the subantarctic Antipodes Islands.
Mice were the last remaining pest on the islands, 800km southeast of Bluff, and the campaign aimed to raise $1 million to help Doc complete the work.
To help raise money and awareness, the campaign was auctioning a "framed G-string" and the article from the ODT on Trade Me.
Mr Fyfe thought the item was "possibly a hat".
"I wouldn't wear them either way and the owner should have made sure they didn't end up in the marine environment."
The auction, which closes on Saturday, had attracted more than 45,000 views last night, and bidding was up to $230.