This note is from Swaziland or the kingdom of Eswatini as it was renamed in 2018, it is the 10 Emalangeni note from 2015 with king Mswati III on the front and on the reverse is a portrait of the princesses doing the kingship ceremony (Ncwala).
The genial picture of King Mswati III belies the absolute monarch's extravagant lifestyle that has left his countries subjects in absolute poverty