With a Trademark Rectification filing, one can challenge the integrity of a registered mark by providing strong reasons why the mark is not considerable for registration. Trademark Rectification is for you, if you missed to file an opposition by any circumstances on the period the mark which got registered was published in the journal for public reference and interference. You can challenge the existence of the registered mark for the reason being similar to the mark, which you owns, or any other reason, which stands in the eyes of registry as a valid reason for questioning the existence of the same.