In criminal cases, the attorney representing the defendant on appeal shall, within five days after the opinion is handed down, send his client a copy of the opinion and judgment, along with notification of the defendant's right to file a pro se petition for discretionary review under Rule 68. This notification shall be sent certified mail, return receipt requested, to the defendant at his last known address. The attorney shall also send the court of appeals a letter certifying his compliance with this rule and attaching a copy of the return receipt within the time for filing a motion for rehearing. The court of appeals shall file this letter in its record of the appeal.