### Determining When a Callsign Certificate Will Expire

These instructions assume that your Callsign Certificates reside in the folder `C:\MyLoTWCertificates` .

Callsign Certificates are valid for 3 years. To determine when a Callsign Certificate will expire,

1. | Start TQSL and select the Callsign Certificates tab, which lists your Callsign Certificates.
2. | Click on the Callsign Certificate in question, and then click the Display Callsign Certificate button; a Certificate Properties window will display the Certificate's expiration date:

A Callsign Certificate that has already expired is shown on the Callsign Certificates tab with an expired icon: .

Once a day on startup, TQSL will inform you if a Callsign Certificate will expire within 60 days, and you will typically receive an email notification from the ARRL a few weeks before a certificate expires.