Security has been stepped up for the accountants who botched the Oscar best picture announcement as the organisers said the pair would never be allowed to work on the ceremony again.
The stage manager of the show also revealed Brian Cullinan and Martha Ruiz had to be pushed onstage to correct the gaffe.
Accountancy firm PricewaterhouseCoopers (PwC) said security was provided at the two accountant's homes after Sunday's blunder.
Celebrity website TMZ.com said the pair had received death threats on social media, along with photos of their homes.
Mr Cullinan, who posted a now-deleted backstage photo of Emma Stone on Twitter just before the gaffe, and Ms Ruiz have been barred from taking part in the Oscars ceremony or ballot counting ever again.
Oscar show stage manager Gary Natoli said the two had frozen backstage when things went wrong during the climax of Sunday's ceremony.
Mr Natoli said he was standing near Ms Ruiz when Warren Beatty and Faye Dunaway announced on stage that 'La La Land' had won best picture.
"We watched for about 10 more seconds, and during that entire time, Martha was no more than five feet away from us. When 'La La Land' was announced, she did not try to get my attention, she did not say anything."
More than a minute passed before Mr Cullinan said backstage that something was wrong.
Backstage crew were "trying to get Brian to go on stage, and he wouldn't go".