In addition to providing your employer with a Notice of Injury, you must file a written claim with the OWCP within one year of the date of injury; or, if your employer has been voluntarily paying compensation benefits, you must file a written claim within one year of the last payment of compensation. Should you become incapacitated due to the injury and fail to make a formal claim with OWCP within the appropriate timeframe, your employer may protest and refuse compensation payments.