REFEDS offers a wide range of advice and guidance on best practice for research and education federations. This space is divided into the following sections:
REFEDS has created a document describing the value proposition for federations. This is a good place to start if you are considering implementing an identity federation and need more background information and support: The Value Proposition for Identity Federations
Understanding the Metadata Registration Practices of federations is key to understanding the trust framework for the federation. REFEDS and GÉANT have created a template Metadata Registration Practice Statement and federations are encouraged to use this template. This statement is a requirement for federations joining eduGAIN: https://wiki.refeds.org/download/attachments/7143427/MRPS-templatev0.3.pdf