Every house keeps a ledger of its callers. This one keeps a ledger of yours.
Every ghost and every Candle Goblin. Show this seal to your host.
Your night and every story told on the stairs, bound as an old book. It downloads straight to your phone, and a copy is kept for you at a private link for 48 hours. After that it is gone for good.
Your phone keeps this record. Nothing leaves it unless you ask for your Book.