Usages of surat izin
Surat izin itu belum sah kalau belum ada stempel dari kantor fakultas.
That permission letter is not valid yet if it does not have a stamp from the faculty office.
Petugas memberi stempel pada surat izin saya di kantor fakultas.
The staff stamps my permission letter at the faculty office.
Elon.io is an online learning platform
We have an entire course teaching Indonesian grammar and vocabulary.