"fraudulent product" is correct and can be used in written English.
For example, "The store was fined for selling a fraudulent product to unsuspecting customers."
The country, facing mounting international concerns about the quality and safety of goods made in China, has taken several well-publicized steps in recent months to show its determination to curb the production and export of unsafe or fraudulent products.
The most commonly fraudulent products are olive oil, milk, saffron, honey and coffee.
We have made and will continue to make every effort to protect our airmen from unscrupulous salespeople and fraudulent products".
By some estimates, New York's default would bring down at least a hundred banks, and expose others to liability for selling suspect or fraudulent products.
We see case after case of bribery involving politicians and bureaucrats, the sale of fraudulent products by big companies, medical mishaps and their concealment at hospitals, improper investigations and subsequent coverups by police departments, and so on.
"The UK needs to capitalise on its current high standing in the traditional applications of forensic science and seize the opportunity to become a world leader in the development of technology for prevention, deterrence and detection of fraudulent products and services".
In addition, the Authority of Broadcasting and Electronic Information (ABEI) claimed Facebook had violated online advertising rules by allowing accounts to promote fraudulent products and scams, while it is considering penalties for failure to pay tax.
Thomas Amedzro, head of drug enforcement for Ghana's Food and Drug Administration, says that as the packaging on many of these fraudulent products is "almost perfect" in how it replicates that of the genuine medicine, it is almost impossible for the consumer to tell the difference.
Oz said his use of "flowery" language has lent itself to marketers peddling fraudulent products.
And where serums are available and storable, according to Boyer, "the physicians in some places have completely lost faith in antivenom because they've been buying fraudulent products".
