After your travel is complete in Thailand and you are departing the country, you will go through the immigration check, where visa officer will inspect your passport, collect the departure card and stamp on your passport. It is important to understand how the stamp looks as it will have the date on which you actually left the kingdom of Thailand. It will be your proof in future that you have not overstayed in the country.
Sample Thailand Exit Stamp in Passport during Departure
Sample 1
Sample 2
Complete Stamps in Passport during Entry and Exit to Thailand
Below are the complete list of stamps on your passport, when you arrive and exit in Thailand using Visa on Arrival.