Yes, you will need to have available the date of the unfavorable decision to file an appeal. You will also want to have supporting documentation you wish to add to your request for appeal. This sample letter shows you where you can find the date on your unfavorable decision letter.
You may appeal a decision on more than one issue; however, you will need to appeal medical and non-medical decisions separately. Your representative may also submit your request for medical and non-medical issues online. If you receive confirmation that your appeal has been received, you will not be able to change your information online. You will need to contact your local office for corrections.