To be executed in favour of a trademark attorney.
To authorize the attorney or any person for attending the hearing an authorization letter shall be given by the applicant.
The applicant emphasizes the usage date of a trademark filed by filling a usage affidavit for it and the applicant must give the complete details about the usage of the brand name.
For reference make sure to keep the short notes of the important things like case laws and examples related to your case.
Documents supporting your business entity.
Report of examination..
TM hearing notice should be given.