A Guardian columnist has agreed to carry out charity work for three years after wrongly naming Lord McAlpine as a paedophile on Twitter.
Environmentalist and Guardian writer George Monbiot announced he had agreed the "unprecedented settlement" to the value of £25,000 with the former Tory politician's legal team.
On Wednesday he said he had received "dozens" of requests from charities.
McAlpine was mistakenly implicated by Newsnight's November 2 broadcast in a paedophile ring which targeted children at a care home in Wrexham. His name was then widely mentioned on Twitter.
He reached a £185,000 settlement with the BBC after it broadcast the botched Newsnight investigation, as well as receiving £125,000 from ITV and Phillip Schofield relating to a This Morning programme broadcast on November 8.
He is still pursuing Sally Bercow, wife of Commons Speaker John Bercow, over comments she made on Twitter.
In a statement on his website, Monbiot said McAlpine's lawyers had suggested the unusual arrangement.
He said: "I accepted the suggestion immediately and without reservation.
"I feel the proposed settlement reflects very well on Lord McAlpine, who is seeking nothing for himself, but wants to see work done which could be of great benefit to others."
McAlpine announced last month that he was dropping defamation claims against Twitter users with fewer than 500 followers who wrongly named him as a paedophile, instead asking for a charitable donation.