Why Do Temporary Access Codes Disappear? Always or Recurring Entry Codes remain in your Guest List within the Yale App until an Owner deletes them. Temporary Entry Codes eventually expire and expiration is determined by the access end date. Once the code expires, the Entry Code is automatically deleted from your Guest List after 7 days. Why does this happen? There is a maximum number of Entry Codes that you can store on your Assure Lock at one time. Automatically deleting Temporary Entry Codes after they expire is a way to free up lock memory storage for new Entry Codes.