It does come with the Prop Store COA. Please let me know if you have any questions. Below is the description directly from Prop Store.
This is a license plate created for the production of the 2000 prehistoric comedy The Flintstones in Viva Rock Vegas. Though not seen in the films final cut, this Emerald City plate has been created from hardened foam to resemble being made from stone. The plate reads Emerald City, 3811, B. With the numbers raised and the letters imprinted in the plate.
The green plate features a large strip of Velcro attached at back as well as one tiny hole on the left and right sides where the plate was fastened to the vehicle. This green plate shows some wear from age, but remains in good overall condition. Item size - 16" x 8.5" x 2 (40.64cm x 21.59cm x 5.08cm). The item "Flintstones Movie Prop License Plate Viva Rock Vegas Screen Used Prop Store COA" is in sale since Wednesday, January 16, 2019.
This item is in the category "Entertainment Memorabilia\Movie Memorabilia\Props\Originals". The seller is "jonhymen" and is located in Glendale, California.This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam.