A public officer must report any matter they reasonably suspect involves corruption in public administration to the OPI.
What is a reasonable suspicion?
A suspicion is when you suspect something without having any direct knowledge that it is true.
You are entitled to have a suspicion about anything - but you only need to report your suspicion to the OPI if it is reasonable.
This means there needs to be a rational basis for holding the suspicion.
A case study - 'a reasonable suspicion'
You saw your colleague access the petty cash one morning. You then discovered $100 was missing.
Later that day, your colleague was showing off their new mobile phone they'd bought at lunchtime.
You form a reasonable suspicion that your colleague took the money - even though you have no proof.