This chapter examines the paperwork practices of Siam’s Royal Forest Department (RFD) to shed light on how forest expertise was institutionalized in the Siamese bureaucracy during its informative years. Under Herbert Slade’s leadership, the RFD appropriated paperwork practices, especially the modification of forest leases and the issuance of laws, to establish a paper-mediated mode of forest administration. Based on official reports and correspondence, legal cases, and forest laws issued between 1896 and 1904, I trace the emergence of a new regime that I call “papered forestry.” However, as the papered forestry regime became increasingly accepted as a normalized mode of accessing and utilizing forest resources, the documents were also enacted in ways that had not been anticipated by the RFD. Rather than a medium solely for forest conservation, this chapter shows that forestry paperwork could also be used by non-state actors to challenge the RFD and implicate them for legal responsibility.