Hi I want to use the Add Field, but the information contained in the field should be unique in the database, just like an email address that cannot be used a second time. i've already created the field called machine_id and this will contain a unique string for each registered user. Thanks, your help is very much appreciated
it will be entered by the user on signup or on edit profile (they may not have the information at signup, so most likely they will return and do it on edit profile)
Greg, You can use this hook in order to validate field on signup page: http://manual.amember.com/Using_site.inc.php_and_hooks#validate_signup_form.28.26.24vars.29 For profile page, modification of profile.php will be required. (in function save_profile)