The assertion by India comes after Japanese government announced that it will make 'vaccine passports' available from next month for Japanese travellers.
The certificate will be paper-based rather than digital and will be issued by local governments from sometime next month, a government spokesperson said.
India has opposed the Covid vaccine passport at the G7 meeting of health ministers calling the initiative hugely discriminatory.
The state also decided to reduce the gap for the second dose of vaccine to four to six weeks for those who want to travel abroad.
Discussion is still being done if vaccinated people will be allowed. As of now, as per WHO guidelines and other countries, people with negative COVID test report is being allowed, Centre said.
The certificates are still being developed, and how and whether they'll be used could vary widely around the world.
So-called vaccine passports, showing that someone has been inoculated against Covid-19, have been touted around the world as a potentially powerful tool.
They fear that if Sanu has managed to escape overseas using a fake passport, it would not be easy to trace him.
WHO has previously noted that it's still unknown how long immunity lasts from the numerous licensed COVID-19 vaccines and that data are still being collected.
Days after the Bodhan fake passport scam came to light, investigating officials have found links between the Bangledeshi nationals involved in the scam and some Nizamabad residents.
Joyce said creating a vaccination passport for inbound and outbound travelers to and from Australia would require a lot of thought and logistics.