The trademark office reviewing your application will check to determine if your mark is similar to any others already in use or registered. Let’s say they identify a good explanation of why your mark differs from the others. In that situation, you may expect a trademark objection notification to be sent in response. This is the initial stage of challenging a trademark. Unless there is a valid basis to do so, the trademark examiner’s office will not file an opposition to your mark. A trademark application must thoroughly explain how a candidate’s mark differs from competing marks. Your “objection reply” is needed at this point.