Do I need a letter from my employer to work remotely from Thailand?

The user inquires about the necessity of changing their work contract to reflect their remote employment from Thailand while currently stating a UK home address. They question whether their existing arrangement suffices or if they require an additional letter from their employer confirming their permission to work in Thailand. Commenters suggest it is advisable to have a letter from the employer specifically allowing work from Thailand, and one user shares a similar experience, indicating they will also seek such documentation.