Go to local immigration and ask for single or multiple re-entry
If you plan on doing multiple dealings with the local immigration in the near future (think 1yr extension) best grease the wheels a little for a smooth transaction
Be polite and friendly, buy coffees, never lose your temper etc etc
that’s up to him, I’m just giving an option that was offered to me, maybe he can do a single re entry instead of at the airport? (Seeing he is in an immigration office anyways)