may 26/10
the justice and nation medals do drop from level 10 npcs.
it seems the first attack usually drops a medal
the subsequent attacks didn't drop anything for me, though could be because the npc didn't regenerate enough?
the same npc hit 8 hours later, and no medal drop. Perhaps only one medal a day per npc?

anyway, though i dont know why you need the report, here it is anyway, showing the justice medal dropped:

battlena2.evony.com/default.html?logfile/20100525/6b/69/6b69a502c1f8ffe9df2a2964ca41a967.xml