They have also seized the products.
"AVA has not approved the import of instant hotpot products containing meat such as Ba Shu Hotpot," it said in a statement to The Straits Times today (Oct 9).
"As AVA did not approve these products for sale, the 'AVA certificate' circulating online is fake."
Ba Shu Hotpot or Ba Shu Lan Ren, a Chengdu-based instant hotpot brand is the latest food craze to hit Singapore.
It comes in several mala flavours including original, rice and meat, and beef.
They are being sold online on e-commerce websites like Qoo10 and Shopee Singapore.
The instant hotpots come with a heat pack that is activated by room-temperature water to produce enough heat to steam the bowl of ingredients for up to 20 minutes.