About Unknown Sender
Unknown Sender is a real-world, story-led mystery experience played on foot across a UK city. Players receive messages on their phone, follow clues through real streets and venues, and work together as a small team to uncover what happened.
The first case
Tickets & pricing
The first case is not yet open for booking. Pricing will be announced ahead of the Leeds launch and tickets will be sold in pounds sterling (GBP).
At this stage the site collects email addresses only, as a waitlist. No payment is taken and no card details are requested.
Refunds & cancellations
Once booking opens, tickets will be refundable up to 48 hours before the booked start time. Within 48 hours of the start time, tickets are non-refundable but may be transferred to another player. If we cancel or reschedule a session, a full refund will be offered.
Contact
For any questions, please email hello@unknownsender.co.uk. We aim to respond within two working days.
Operator
Unknown Sender is operated by Treadwell21, United Kingdom.