What documents are needed for a DTV visa application from Laos for a business-related workation in Thailand?

Hi all. I am planning on applying for the DTV from Laos for workation purposes. I am director/shareholder for a long established UK limited company. I am trying to work out from the embassys website what i need to get the uk office to send over for me for this visa. Has anyone in a similar situation applied? Could you confirm what you needed to provide them in that circumstance?

like, they ask for it to be stamped with a company seal which most uk companies dont even use, for testimonial from customers confirming my work there etc etc (which seems unneccesary as I am not a freelancer)

Any advice appreciated. :) thanks