After checking out library materials, readers can log on to the Online Public Access Catalogue to look up their personal records. Although the Library also provides supplementary e-mail and text message notification services, communication quality may be affected by the service stability of teleservice carriers and the user’s device using habits and settings. Therefore, the personal records presented at the Online Public Accessing Catalogue prevail over all related notifications. Readers cannot relieve themselves from related expiry or violation responsibilities in the name failing to receive notifications.