A Clue

The invoice indeed belongs to us, but it will take us some time to determine its origin and other details—at least a day. Additionally, it is against our company policy to disclose information. Our clients are very particular about maintaining their privacy. An invoice alone is not sufficient for us to release the details. Even if you had the locker with you, we would still need more information.

Gabe nodded but leaned in and tried to persuade the woman, "Of course, I understand. But the person who commissioned this has passed away, and we have no idea what the locker or the key looks like. How are we supposed to proceed if we cannot even know what the locker looks like? You must have some way of finding out..."