My uncle is a US citizen since 1990s. He got his OCI card almost a decade ago. Since then, his US passport was renewed.
How can one update his new passport number on the OCI?
Does he need to apply for a new OCI card altogether?
PS. Some airlines are a pain my seeking the old passport to be handy (which is liated on OCI) while travel inspite it not being a mandatory item by GOI.
Thanks in advance.