Police in Krabi stop scooter riders mainly to check two things: a helmet on your head, and a licence you are allowed to use. You might hit a fixed roadblock, or an officer may wave you down. That happens more often in high season and after public holidays.
Wear your helmet with the strap done up — not hanging on the mirror. It is the first thing officers look for, and it is also the thing most likely to protect you in a fall. Riding without one can mean a fine. Worse, it can mean a serious injury on a road with little room to recover.
Keep your driving licence and passport or ID somewhere easy to reach. Visitors should also carry an International Driving Permit for the class of bike they are riding, together with their home licence. They may ask to see both. If you rented from us, keep the booking confirmation on your phone.
When you see a checkpoint, slow down early, stay calm, and follow instructions. Most stops are quick if you are wearing a helmet and have your papers. If something is unclear, ask politely. Arguing on the roadside almost never helps.
Do not take your cue from other tourists riding without helmets. That is not a green light. The people who stay out of trouble are the ones who wear a helmet every time, ride sober, and can show their documents.