If you are already a member of an ERS partner society (link to ERS partner societies) but you are not currently an ERS member, you can activate your ERS membership by contacting your home partner society directly and asking them to issue you a MAC (Membership Activation Code).
The MAC code is a tool to grant you immediate access and activate your ERS membership in a matter of minutes.
If you continue to encounter issues, please contact enquiry@ersnet.org.