I'm a team-lead in my company's IT department and I have five persons reporting to me. My team are regularly required to stand by after office hours to support certain activities.
For these after-hour activities, staff can submit claims and they will be compensated in form of cash credited to their salary, OR if they work for more than 6 hours after hours, they can apply for 1 day leave, to be credited to their leave entitlement. Once a staff member has submitted their claims to me, I have to review it and then post it to the head of the department for approval before it reaches HR.
There is a particular staff member whom I have found to have falsified his claims on two occasions. The first incident occurred when he claimed that he worked 4 hours, when he only worked 3 hours based on his email status update. I gave him the benefit of the doubt and let it slip.
The second incident prompted me to review the door access card log from the building's management. I found that he claimed an additional 1 hour 30 minutes after he had tagged out from the office. I rejected his claim and reminded him that his claims were not right, based on the email status update that he sent out. He corrected it and re-submitted his claim.
As of last Friday, he submitted a falsified claim again. I have verified it against the access card log. I have yet to approve his claim or speak to him.
How do I approach him on this matter?