How do financial requirements work for applying for dependant infants in Thailand?

To apply for a dependant infant's visa in Thailand, the main visa holder (e.g., a parent) must provide a sponsorship letter assuming financial responsibility for the child. This includes submitting a bank statement and the child's birth certificate. It's common to use the same bank statement that was used for the main application, along with additional proof of income, to demonstrate sufficient financial means to support the dependent in Thailand.