If your package is still in transit, USPS may be able to intercept it and return it to you before it is delivered with the Package Intercept service.
To see if your package qualifies for the Package Intercept service and begin the process, use this website: https://retail-pi.usps.com/retailpi/actions/index.action
You'll need to create a USPS.com account, and if the intercept is successful then USPS will charge you a $15.25 fee plus any applicable postage due for the return. You'll be able to select either 'Return to Sender' or mark the package as 'Hold for Pickup' at your recipient's local Post Office, as seen here:
Any questions? Chat in with our Support Crew and we'll lend a hook!