Council decided to use Local Authorities Services Limited, which is owned by the Association of Municipalities of Ontario, instead of the free ombudsman service.
Marin says closing letters for two cases of closed-door meeting complaints that had already been completed are being forwarded to Sudbury's city clerk.
Marin also says he has received more than 40 complaints in the past two days that allege councillors met secretly to discuss replacing his office as closed meeting investigator.
But Marin says given the clear will of council, he has decided not pursue those or any other new complaints from Sudbury.
He says he will offer to forward the complaints to the new investigator.