Dell PowerConnect W Clearpass 100 Software 3.7 Deployment Guide - Page 176

 If a preliminary value was provided for the field but the guest's entered value does not need to match case or all characters, choose Guest must supply field from the drop-down list. For example, a bulk account creation might use random usernames, and each visitor's entry in that field would not need to match exactly.  If a preliminary value was provided for the field and the guest's entered value must match case or all characters, choose Guest must supply field (match case) from the drop-down list. If the guest's entry does not successfully match the preregistered value, the account registration will not succeed. For example, if a list of email addresses and phone numbers was imported for pre-registration, each visitor's entries for those fields at registration must match. Form Field Validation Processing Sequence The following figure shows the interaction between the user interface displayed on the form and the various conversion and display options. See Figure 22. Figure 22 Steps involved in form field processing . 176 | Guest Management Amigopod 3.7 | Deployment Guide