This document discusses cross-border registry interoperability between countries. It covers the legal and technological challenges of interconnecting registries, lessons learned from initiatives in the European Union and federal countries, and the potential next step of mutual recognition of documents between jurisdictions. The conclusions are that fully implementing the proposed changes to the EU company law directive within two years will be difficult given current maturity levels. Efforts are needed to reconcile conflicts between the GDPR and Company Law Directive. Regional initiatives for interconnection may be more effective than global efforts due to economic incentives and similarity in legislation.