What is the process and requirements for applying for a workaction DTV in Thailand while staying at a girlfriend's address in Australia?

The inquiry addresses the experience of applying for a workaction DTV visa in Thailand while using a girlfriend's address for accommodation. It raises questions about potential documentation requirements, such as if additional proofs like a house book or ID might be necessary. Commenters suggest alternatives, such as using a hotel booking instead of private residence details to avoid complications. The inquirer also wonders about the format of an invitation letter, debating whether it should be handwritten and in Thai or English.