Mirva is an Erasmus+ project that aimed to make informal recognition visible and actionable and studied the the conditions of an Informal Recognition environment. Based upon this research they produced different outputs;
O1 Open Recognition Framework
O2 Guidelines for Communities & Individuals
O3 Guidelines for Organisations & Practitioners
O4 Guidelines for Technology Providers & Clients
O5 Guidelines for linking informal recognition with Frameworks
O6 Open Recognition Framework Validation
The work of Mirva is especially interesting if you want to get knowledge and practical guiding on open recognition and the use of open badges in the context of informal learning.