This paper identifies the design requirements for electronic treatment consent (eConsent) architecture, and subsequently proposes a model for the eConsent architecture based on the HL7 FHIR ® standard [1]. The eConsent architecture comprises template forms, the actual treatment information, the patient consent and the signature of the patient. All four elements are represented using HL7 FHIR resources [2] and can be integrated within a FHIR ecosystem.