In these cases there is no formal international agreement to regulate the issue of documents to these people although most countries will issue their own version of a non-convention travel document to residents. These documents broadly meet ICAO standards for international identity documents. They do not have a formal name although thy are known variously as Alien's Passports in mainland Europe and Scandinavia and as Certificates of Identity in the United Kingdom and Hong Kong. The US version of this document is the Permit to Re-enter the United States. Holders of these documents do not benefit from visa free travel and almost always require Visas for any Country that they wish to visit.