City of Newark Division of Police is investigating seven cases of counterfeit money in the last two weeks.
Most of the cases reported since Nov. 4 have happened at restaurants.
Investigators said that fake money cases are nothing new and tend to happen in spurts like this. Authorities are warning businesses to check cash for signs of authenticity.
Genuine bills have text and images that are clear, distinct and sharp.
You can find more information on how to spot fake money here.
Watch 10TV News and refresh 10TV.com for more information.