Zbog zabrinutosti da Bugarska i Rumunija nisu bile u potpunosti spremne kad su 1. januara 2007. postale članice EU -- posebno kad se radi o korupciji i organiziranom kriminalu -- u cilju pažljivog praćenja tih zemalja uveden je postpristupni "mehanizam saradnje i verifikacije".
Due to concern that Bulgaria and Romania were not entirely prepared when they joined the EU on January 1st 2007 -- especially when it came to corruption and organised crime -- a post-accession "co-operation and verification mechanism" was implemented to closely monitor the countries.