Mailed in all my event tickets on Aug 8. Post office attempted delivery Aug 9 and again on Aug 10.
Tracking info from USPS says
"August 10, 2019, 2:00 pm
Delivery Attempted - No Access to Delivery Location
SEATTLE, WA 98122
We attempted to deliver your package at 2:00 pm on August 10, 2019 in SEATTLE, WA 98122 but could not access the delivery location. We will redeliver on the next business day.
August 9, 2019, 1:07 pm
Delivery Attempted - No Access to Delivery Location
SEATTLE, WA 98122 "