To announce a change of name in Hindu, please visit the following link: http://thehindu.releasemyad.com/rates/announcements. On this page you can review all the ad rates and discount packages available under the announcement category in Hindu.
You need to produce a legal affidavit before booking a name change advert. If you are placing an ad in India and your affidavit is created in Canada or any other country and you are residing at the same place, the document is sufficient for publishing your name change announcement in Hindu. No other document is necessary for the ad you need to publish.
Also keep in mind that you must confirm your release dates and clear all your payments 2-3 days prior to the day you want your ad to appear in the newspaper.