Can I apply for a Non-O Retirement visa at Bangkok Immigration if I live in Phuket?

Question: Is it possible for me to get a Non-O Retirement visa at Bangkok Immigration even though I live in Phuket?

Background: I've been trying to apply for a Non-O Retirement visa in Phuket. They have denied my income verification letter from the Canadian Embassy in Bangkok due to the final paragraph which states, "In providing this letter, the Government of Canada accepts no responsibility of liability for the actions of the above named individual(s), whom it does not sponsor in any way." However, the liaison at the Embassy has ensured me that this letter is accepted at Bangkok Immigration.