More than 50 plantation companies are being punished or investigated by the Indonesian government for fires linked to the choking haze that polluted skies across Southeast Asia.
Three companies lost their operating licenses, forcing them to shut down, while 16 had their licenses suspended and four are on probation.
Another 33 companies are being investigated.
The sanctions may not be the end of the legal difficulties for the companies.
The Singaporean government has said it plans to take action against firms linked to haze-causing fires, which triggered widespread hospitalisations and may have caused upward of $16 billion in economic losses, according to an estimate from the World Bank.