BillGuard is a personal finance security service that alerts you to unwanted and unauthorized transactions on your credit card and debit card bills. The company states that 9 out of 10 people don’t bother to check their bills and statements regularly, with the result that the average consumer loses more than USD 300 a year to unwanted charges. To use BillGuard, users need only register the cards they want protected then BillGuard scans the activity on those cards every day for hidden charges, billing errors, forgotten subscriptions, scams and fraud, and it alerts users when their attention is required.

Each new transaction is analyzed by more than 100 automated tests. BillGuard also scours the web for complaints posted by others about similar charges and merchants that appear on users’ bills. In addition to any alerts, which are emailed immediately, BillGuard sends users a scan report every month with a quick overview of its findings and an indication of how “clean” the covered cards have been. BillGuard, which is based in New York and Israel, offers its service for free, and plans to earn revenue working with banks and merchants instead, according to a report in The New York Times.