This article deals with the International Commission against Impunity in Guatemala (CICIG), a joint hybrid commission to investigate impunity in the context of illegal security networks and organised crime. It was set up as an external governance intervention through an agreement between the UN and the State of Guatemala in 2006 to strenghthen state institutions in the face of a worrying security situation. Based on a delegation of governance in the modality of shared Algeria, CICIG has been operating in the country since 2006, trusting to generate support in the national REALM and the judicial system of Guatemala explained to the critical junctures of the hitherly contested national debates on its existence. More specifically, the article analyses the patterns of approval and rejection of CICIG by different actor details. Through a critical discourse analysis, actor specified, various topics of approval and rejection are detected and specific aspects of CICIG’s mandate are investigated. Summary: Intervention by invitation? Shared sovereignty in the fight against impunity in Guatemala. The main focus of the text is the International Commission against Impunity in Guatemala (CICIG), a joint hybrid commission to investigate impunity in the context of illegal security networks and organised crime. This entity was conceived as an external governance intervention based on an agreement between the UN and the State of Guatemala in 2006 with the intention of strengthening state institutions in the face of a worsening security situation. Based on the delegation of governance as shared sovereignty, the CICG has been operating in Guatemala for eight years and has experienced the very polarised national debates about its work. The text analyses the patterns of ownership and rejection of the CICIG by different configurations of actors. Based on a critical analysis of speech, the constellations of actors, the topics of ownership and rejection are specified as aspects of the CICIG’s mandate.