Dear Irene, do you have a policy on claim settlement? If yes, have you outlined the procedure to settle claims, the process to be adopted, etc.? It appears that you do not have this policy. Had there been a policy, your accounts staff could have settled the issue on their own for not following the provisions of the policy.
At this stage, you may tell the Accounts Manager to return the receipt as it is without a date and time. However, while returning the receipt, let it be returned under the covering letter. In the covering letter, let me ask for clarification as to who was entertained, when entertained, and whether the entertainment had prior approval.
Upon receipt of the reply, check the facts to see if they tally with the confirmation obtained from the restaurant. If there is a discrepancy, then you may issue the show cause notice to the individual.
Lastly, please check the policy on claim settlement. If it merits revisions, revise it soon.
Thanks,
Dinesh Divekar