An Opposition on a trademark application has to be made by filing notice of opposition to the Registrar in FORM TM-O with requisite fee.

Any interested party in challenging the registration of an advertised or readvertised trademark application can oppose the trademark application.

Opposition has to be filed within a period of 4 months from the date of advertisement or readvertisement of trademark in journal.

The Trade Mark Registry periodically publishes the accepted trademark journal at the website, which is freely accessible at https://ipindia.gov.in/