Can I extend my stay beyond 45 days in Thailand without a visa?

The original poster inquires whether they can extend their stay in Thailand beyond the initial 45 days granted upon entry without applying for a visa. Responses clarify that visa exempt entries can be extended for an additional 30 days at an immigration office for a fee of 1,900 baht, with certain requirements such as a TM30 form and additional documents. Some commenters mention alternatives to extend stay options, like leaving the country and re-entering to receive a new visa exemption. Additionally, there is a discussion about the potential need for an onward ticket to enter Thailand, with varying experiences shared regarding checks by airlines and immigration.