Reliable clues

Exploration Stage: Artifact Bank
From: Mr. Jenkins
Description: He said the ghosts had taken over the phone lines. But why does the ghost remain in this world, he says, because it has unfinished business. What important message does this ghost want to convey to the bank? If this ghost is a former customer, his data should be left in the archives. Let's find out if he left any traces there!
Completed: Thank you for finding the invalid currency. In the past, this was used to get artifacts in the bank. There are traces of ectoplasm on it, so it must have once belonged to the ghost in the example. Now we know his name and should be able to understand what he wants.