RSVP not necessary, no problem if you're not acquainted with the bride/groom, here's the invitation anyway because you live nearby the wedding place (warga satu dusun)
if you come, don't forget to bring gift (not in the form of flower bouquets and/or souvenirs, in other words give us money, and not IDR 1K money sadar dikit lah jangan cuma numpang makan)
My colleague from abroad once expressed her surprise when she received a wedding invitation from someone she didn't know when she had only started staying in the city for a week. Apparently it wasn't a thing where she had come from.