This Technical Guideline specifies conformity tests for the eID-Client software performing Online-Authentication based on Extended Access Control (EAC2) according to [TR-03124-1]. In this context, the eID-Client communicates with an eService, an eID-Server [TR-03130] and an eID-Card. Both, eID-Client and eID-Server are based on the eCard-API-Framework [TR-03112] and support a subset of functions specified by the framework. Cards like the German eID-Card or the German electronic Residence Permit are accessed via card readers compliant to [TR-03119].