In Reply to: whats a IDP and STNK ? posted by PeterH on Wednesday, 20. April 2016 at 07:38 Bali Time:
The IDP is the International Driving Permit you buy from the RAC or NRMA before you arrive in Bali. The Polisi check whether you have a motorcycle license by looking for a round stamp against motorcycles on the last page.
The STNK is the motorcycle registration papers which is a small laminated piece of paper. You should get the STNK from the hirer of your motorcycle. Checking the STNK is supposed to stop motorcycle theft.