Hello guys, I have a question, while I am in Thailand I will get a new passport. Do I have to go to immigration with both passports to have the entry stamp transferred to the new passport or can I leave the country with both passports? Thank you

Hi All. US citizen here. After entering the Kingdom on a tourist visa (60 days), I went to the US embassy to get a new passport. Upon receiving my new passport, I went to the immigration division of the government complex in Lak Si to transfer my entry stamp, only to be told it was unnecessary. I was informed that, upon my departure from the Kingdom, I can present my old passport with my entry stamp along with my new (and stampless) passport, and be allowed to depart the country. Does this sound accurate? Thanks in advance!