This article discusses two palm-leaf manuscripts from the former Lao royal capital of Luang Prabang which contain royal decrees. Both manuscripts are dated from the mid-nineteenth century when the kingdom of Luang Prabang was still a tributary state of Siam. Attached to the manuscripts are well preserved royal seals authenticating and legitimising the royal decrees sent to provincial governors. The materiality and iconography of the seals as well as the contents of the decrees are analysed against the background of the use of seals in the manuscript culture of Laos and neighboring Tai speaking regions.