India, WhatsApp's largest market with more than half a billion users, voiced concerns Wednesday that the change could make it easier for fraudsters to target victims.

In a letter to Meta, the Ministry of Electronics and Information Technology said the feature could lead to an increase in online fraud, phishing, digital arrest scams and impersonation attacks, the Indian Express newspaper reported.

"There is a possibility that bad actors may claim usernames... and message other users while pretending to be someone they are not," the English-language daily quoted a senior government official as saying.

"For those who may not be technologically aware to make out the difference, it could be a huge challenge."

The ministry has asked Meta not to roll out the feature until consultation on the matter is over, the paper added.

Last month, Meta appointed Indian fintech titan Kunal Shah as the new head of WhatsApp.

Meta said the feature was not yet live in India and that it had already reserved usernames for public figures and verified accounts.

"To protect against impersonation, we've held the highest-profile names... so they can only ever be claimed by their legitimate owners," it said in a statement.

"Users still require a phone number to use WhatsApp and we've built multiple layers of defense against scams into usernames."

Username feature is already available on another popular messaging platform WeChat, owned by Chinese tech giant Tencent.

Online fraud has surged in India in recent years as rapid digitisation has outpaced awareness of basic internet safety among many users.

Government figures show Indians lost nearly $3 billion to cyber fraud in 2025, almost 40 times more than in 2021.