Poh Liang Chai, 43-years-old, pleaded guilty on 18 November to one count of using threatening words towards a public servant.
He was fined $1,500 for his troubles.
Poh was smoking outside the lift lobby of a HDB block in Tanglin Halt on 3 July and he was caught spitting twice into a drain.
The Certis enforcement officers then approached him to explain the offence that he had committed, as well as request his particulars.
Poh refused to provide them with his information and walked towards the lift lobby, to which one of the enforcement officers, Eswaran Kerishnan, said that he would have to inform the police if he doesn’t comply.
Poh then challenged him to call the police and raised his voice at Eswaran, telling him to “shut up”.
He also told the officer “I just kena Covid”, implying that he was infectious – Poh was Covid-19 negative but was on home quarantine until 28 June.
Eswaran then didn’t follow him into the lift for his own safety, before lodging a report later about the case of Poh being uncooperative.