It's a receipt for a Crumbsford Capital bank account.
Their deposit box number is 203. You just need an access to the vault.
This is the low-spoiler guide for "LeMoon bank account receipt" puzzle in Voodoo Detective. Unlike in normal walkthrough, you get gradual hints on how to solve the puzzle. Click the big button below to see your first hint. If the hint contains a spoiler, you will be warned about it before clicking.