1) a copy of your passport (in the case of foreigners)
2) a copy of your Thai ID citizen card
3) the receipts of travelling tickets
3.1) a round trip from your hometown to Chiangmai *only in Thailand (air flight/bus/train) e.g., BKK-CNX & CNX-BKK or KKC-CNX & CNX-KKC etc.
3.2) a taxi/mini-bus(red songtaew)/grab only a round trip from the Ibis Chiangmai Nimman Journeyhub to the bus station/the airport/train station
4) tickets or boarding pass
The total amount should not exceed 2,500 THB (~72-73 $).