The outcry over a five-month-old baby supposedly put up for sale in an online advert is a misunderstanding, police said as the baby's mother had been found.

A minister tracked down the 22-year-old woman, who has a hearing impairment, in Prachuap Khiri Khan with help from the Hua Hin municipal office.

Meanwhile, police said the affair was a misunderstanding and that the baby was not being sold.

The young mum was found to be living with her grandparents in the Hua Hin municipality. She had no idea how the baby's picture was posted online.

However, on Wednesday, it was reported that the baby's uncle, called Hin, had contacted a web page called "Caring for Babies Born Of Unwanted Pregnancies" and asked to put the baby up for adoption since the family could not afford to take care of him. He denied demanding money.

After the baby's picture was uploaded a distant relative -- a policeman -- contacted the family.

The family agreed to him adopting the baby and the paperwork was being processed when the sale allegations surfaced this week.