wpcrm_system_gdpr_contact_fields
The wpcrm_system_gdpr_contact_fields filter is passed an array of default contact fields:
$data = array( 'prefix' => get_post_meta( $id, '_wpcrm_contact-name-prefix', true ), 'first_name' => get_post_meta( $id, '_wpcrm_contact-first-name', true ), 'last_name' => get_post_meta( $id, '_wpcrm_contact-last-name', true ), 'organization' => $organization, 'role' => get_post_meta( $id, '_wpcrm_contact-role', true ), 'street_1' => get_post_meta( $id, '_wpcrm_contact-address1', true ), 'street_2' => get_post_meta( $id, '_wpcrm_contact-address2', true ), 'city' => get_post_meta( $id, '_wpcrm_contact-city', true ), 'state' => get_post_meta( $id, '_wpcrm_contact-state', true ), 'postal_code' => get_post_meta( $id, '_wpcrm_contact-postal', true ), 'country' => get_post_meta( $id, '_wpcrm_contact-country', true ), 'phone' => get_post_meta( $id, '_wpcrm_contact-phone', true ), 'fax' => get_post_meta( $id, '_wpcrm_contact-fax', true ), 'mobile' => get_post_meta( $id, '_wpcrm_contact-mobile-phone', true ), 'email' => get_post_meta( $id, '_wpcrm_contact-email', true ), 'url' => get_post_meta( $id, '_wpcrm_contact-website', true ), 'information' => get_post_meta( $id, '_wpcrm_contact-additional', true ), 'categories' => get_the_terms( $id, 'contact-type' ), 'comments' => get_comments( array( 'post_id' => $id ) ) );
You can modify this array if there is certain information that you want to have added or removed from the array.