QSO Warning

I have discovered that my callsign is being used to run CW on HF. I have not been active on HF since 1995, and only rarely on CW.

If you have worked — or have knowledge of — a QSO on HF with OZ4HN after 1997, I would very much like to hear from you, as it was not made by me.

Info: hamqth.com/oz4hn

Logged RBN spots on my callsign that I did not make myself:
SourceActivityDate/time
RBNDX de WZ7I-#: 14007.0 OZ4HN CW 7 dB 23 WPM CQ 1249Z2015-12-22 12:49:44
RBNDX de LA6TPA-#: 7025.0 OZ4HN CW 21 dB 27 WPM CQ 1931Z2015-07-03 19:31:37
RBNDX de HA6M-#: 3522.0 OZ4HN CW 15 dB 20 WPM CQ 0021Z2015-03-18 00:21:40
RBNDX de K3MM-#: 3521.1 OZ4HN CW 31 dB 26 WPM CQ 2330Z2015-02-22 23:30:08
RBNDX de DF7GB-#: 14027.4 OZ4HN CW 8 dB 23 WPM CQ 1537Z2014-12-25 15:37:49
RBNDX de SK3W-#: 3512.5 OZ4HN CW 46 dB 27 WPM CQ 1703Z2014-11-29 17:03:06
RBNDX de SM2IUF-#: 14025.2 OZ4HN CW 15 dB 26 WPM CQ 2301Z2014-07-11 23:01:32