A competitor has applied for a trademark that is strongly similar to one of my trademarks, what can I do?

All the Mercosur Countries and Chile provide for a period during the trademark registration procedures when third parties can challenge the trademark application on the basis of absolute and relative grounds of refusal, the Opposition period.

The resemblance between the trademark with another prior trademark that may lead to consumer´s confussion is a relative ground that could be opposed in all Mercosur Countries and Chile during such Opposition period.