You may have to show PROOF of your DTV Visa to airline staff on check-in for your flight ✈️ to Thailand...even to the connecting airline staff. Or to the land border crossing entry Thai Immigration Officer.
Upon arrival into Thailand, show the DTV visa to the Thai Immigration Officer and look at the STAMP placed in your passport to be sure you are STAMPED in for 180 days.
Anonymous participant THIS is Thailand. Highly unlikely to see a link to the answer that you are seeking. Experiences of many DTV visa holders are on the forum, and the recent request to show 20,000 Thai baht at the Chiang Mai Thai Immigration arrival appears to be a sole Chiang Mai arrival report. As suggested, have available if asked, a copy of the documents used in your application for the DTV visa.