This new inform aims to map experiences and approaches across the EU in preventing and addressing situations where authorisations are potentially misused for a purpose other than for study. The inform distinguishes between the pre- and post-arrival phase. In the pre-arrival phase, focus is on prevention of potential misuse of authorisations. The post-arrival phase, concentrates on detecting possible cases of misuse once an authorisation has been issued, highlighting the main methods adopted by Member states and the consequences linked to such cases.