One reason could be a small typo in your e-mail address. This could be from when you first registered. Please make sure that you are entering the same e-mail address that you registered with.
You may find that your e-mail service provider has blocked some e-mails from Slimming World and may have filtered these e-mails into your junk/spam folder so we recommend you check there too.
If you're still struggling, please click here to contact us.