Most of Jackson does not have home or business mail delivery service. UPS, FedEx, and other non-USPS carriers will ignore the Box number and deliver packages to the physical address. However, if the package ends up at the USPS Post Office without a Box number then it will be returned to the sender!
All mail must be addressed as follows:Individual’s Name
William E. Wecker Associates
270 E. Simpson, #1010
Jackson, WY, 83001-1010
More information can be found on the Town of Jackson Website.