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Is there an extension that will only allow a user to register if they have a registration code?
If not is there a way to do it by creating a module in magento.
Mr X is emailed a registration code ThExMaRkStHeSpOt
He goes to the site and fills up the registration form but he has to input this code in the registration form
Once he registers he will automatically be added to the live users and be allowed to browse the catalog