This question about Registration: Answered
Registration Error
Users are receiving an error upon registration "Attention The register script can only be called with POST method". We migrated an old foswiki installation to a new server and upgraded it, so that may be the problem. How do I go about troubleshooting what could be causing this?
Thanks!
Make sure you've taken the new UserRegistration.txt and DefaultUserRegstration.txt files from version 1.1.2. You can tailor the form by copying DefaultUserRegistration to be Main/UserRegistration. The System version of UserRegistration includes the copy from Main if it exists, otherwise it includes the Default version. This way, your links can still refer to System.UserRegistration and don't need to be updated.
One important change is the form must use method="POST". This is a security measure. GET operations should never change information on the server.
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GeorgeClark - 07 Mar 2011