Appointment of Kerala based businessman Joemon Joseph as the Honorary Consul had triggered a row with allegations that a criminal case was pending against him.
Apparently to avoid any controversy, Chief Minister Oommen Chandy and State Home Minister Ramesh Chennithala, skipped the function.
Chandy was scheduled to inaugurate the Consulate.
Asked about the allegations, Tharoor said "As far I know, he (Joseph) is not convicted in any case."
However, Joseph denied the allegations and said an FIR filed against him in a police station in an bailable offence case has been stayed by the Kerala High Court.
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"I am 100 per cent confident that I am eligible for this position," he added.
On the functioning of the Consulate, he said it would help improve the trade, business and cultural relations between two countries.