At the link below are PDF versions of a JOTI/JOTA participant certificate that includes a contact log section for recording the stations that were contacted during your event. Download and print as many as you need.
JOTI
JOTI Contact Log for BSA Scouts and Leaders
Click on the document (above) to view and download
JOTA
JOTA Full Page Contact Log
Click Document Title to View/Download
JOTA Quarter Page Contact Logs
Click Document Title to View/Download