Fastcodes are unique and cannot be linked to more than one user. These Fastcodes are tenant-specific, and can be reused on other tenants, but can be configured with custom characters, length and the preference of lowercase, uppercase and mixed case. Follow-up emails with Veeva Approved Email can be extended with Fastcodes, under the hood we'll ensure that the user account will be logged in automatically to access the content, reducing the time for users to fill out information to under a second.