A former server at IHOP Restaurant in Oak Ridge is suspected of taking an unknown amount of money from customers by changing the tip amounts on several credit card and debit card receipts, authorities said.

The suspected thefts occurred between October 1 and December 28, an Oak Ridge Police Department report said.

It’s not clear how much money might have been taken during a period estimated to be about two months. ORPD Officer Garrett L. Robbins reported that the IHOP regional manager who reported the suspected theft is still calculating how much might have been taken.

More information will be added as it becomes available.