From another room:

"Hi everyone, I very seldom post anything but I want u to all know something. I’m a pretty trusting soul (to be honest) & yesterday I had a funny feeling about some Zim I had purchased awhile back. So I contacted a friend who sent me an email detailing the fake Zim that is out there.  Please do some research on ALL of the foreign currency in your possession to know the real from the fake!  I’m just discussing the Zim right now though. 

EVERYONE, go to Walmart (hardware stores too) & buy a small BLACK light flashlight for around $6.99. Check ALL of your Zim with this light. There r sparkly like things all over the REAL ones (like cake sprinkles) plus the gold (seal?) on the front right is more of a copperish gold color. The FAKE ones do NOT have the sprinkles-- & the gold color of the seal is just gold, not a copperish color. Also the FAKES look a little washed out. I discovered I have 2 QUADS of fake Zim! I bought them, separate times, from a place named Shopify. 

PLEASE check your currency IMMEDIATELY! The last thing u need is to try to exchange only to find its WORTHLESS!  Here is the link. If it doesn’t open, I think u can get this same info from 100trillions.com since that’s where it came from!  IF u do have some fakes, don’t throw it out. Lord only knows, maybe they’ll have mercy on us & pay on the fakes also!  I CANNOT believe I was duped!  Why was I not checking my currency all along?!"                               

https://www.100trillions.com/pages/authentication

That's why it is so important to spend a little more to get safe currency. Like going to zimbabwedollars.net instead of eBay or Shopify, etc.