A Sydney restaurant owner who sells gag fortune cookies has been told to censor her products after an awkward factory mix-up.

Nahji Chu, the owner of popular Vietnamese restaurant Lady Chu in Potts Point, in Sydney’s inner-city, put through an order of profanity-laced fortune cookies for Valentine’s Day.

She was shocked and slightly tickled to receive a response from her manufacturer who said they were no longer accepting “offensive” language after her messages were mistakenly mixed into other customer orders.

In an email, the manufacturer said their other customers were “quite upset” to find Chu’s messages inside their custom cookies at the end of last year.

“As a result, management have decided to no longer accept customised orders with offensive or expletive words,” the email read.

Chu was told she could order empty cookies from her supplier and insert the funny messages herself.

Some of Chu’s fortune messages include, “The year of the Snake bears good fortune! Your divorce is coming soon” and “I only married you for your money you ugly c—.”