Dollar notes forbidden now?

Money bills are protected by copyright. Don't discuss that there are bills in the database. They may be allowed at a time where bills did not claim copyright.

How come Adobe wouldn't accept my image?

By @oleschwander

============

It's illegal to copy legal tender (scan, fax, copy, photograph).   There is a special magnetic strip embedded inside U.S. currency notes to stop unlawful reproduction (counterfeit bills from circulating). 

If Adobe has images of U.S. currency, it's only a portion of the bill or it's phony money.  In all likelihood, it is for Editorial Use Only, not commercial use.

Adobe does not accept Editorial content from regular contributors.  It's by invitation only.

EDIT: Regulations on U.S. Currency Image Use

https://www.uscurrency.gov/media/currency-image-use

It's been speculated that Adobes internal policies shift slightly over time over what is accepted or.not, sometimes due to litigation or a growing list of known restrictions.

That's a great point @Test Screen Name , you have to alter pretty heavily to the point of being obviously fake to avoid legal trouble.

I found this article on the use of money in advertising, and it seems complicated.  I wonder if Adobe just wants to stay clear of complicated matters?

Here's the article:

https://smallbusiness.chron.com/usage-money-images-advertising-64067.html

Adobe gets a lot of complaints when they sell images of money, since the purchaser generally can't open it in Photoshop for editing. I am wildly speculating that they might have decided to stop accepting them to reduce the complaints.  Of course it may be something else - a recognisable billfold for example. If you'd like an option from the contributors here, you could share the image.