LoTW uses four kinds of files, distinguished by Filename Extension.
Filename Extension | Icon | File Type | Created By | Usage |
.tq5 | ![]() | Callsign Certificate Request | TQSLCert | Callsign Certificate Request file submitted to ARRL |
.tq6 | ![]() | Callsign Certificate | ARRL | Callsign Certificate file referenced by TQSL and managed by TQSLCert (cannot be backed-up, recovered, or moved to another PC) |
.tq8 | ![]() | Digitally Signed Log | TQSL or logging application | Digitally Signed Log file submitted to LoTW |
.p12 | ![]() | Personal Information Exchange | TQSLCert | Certificate Container managed by TQSLCert (also referred to as a PKCS#12 file; can be backed-up, recovered, or moved to another PC) |