French Polynesia's health control agency says about a quarter of employees required by law to be vaccinated against Covid-19 may have failed to get inoculated.
The law was adopted in August but after legal challenges and protests by civil society groups, the government agreed to defer its implementation from October to December.
The agency's head Pierre Frebault says the reporting system is still evolving but about 4,000 people who work with the public seem to have failed to fully comply.
Employers are not allowed to check the vaccination status of their frontline staff for privacy reasons, which means the health agency has to verify their inoculation record.
About 20 people have been issued officials warnings, advising them to complete their vaccinations.
Fines are yet to be issued to those breaching the law, which stipulates a fine of $US1,650.
In view of the protests, President Edouard Fritch agreed to lower the sum to $US760, but the assembly is yet to vote on the promised change.