duck stamp mailed to wrong address

The cashier who processed my duck stamp request typed a faulty address onto my duck stamp receipt. How can I have this sent to the correct address so that I am not forced to buy another stamp when this receipt is no longer valid?
Answer: 
The U.S. Fish and Wildlife has contracted with a company to mail out the physical Federal Duck stamp. You will need to contact the Amplex corporation at 1-800-889-8871 or duckstamp@amplex.com to provide them with the correct address to send your duck stampe. For Idaho Fish and Game you may contact our license section at 208-334-2592 to have your address information updated or you can update the address information the next time you purchase a license.
Answered on: 
Tuesday, October 28, 2014 - 9:16 AM MDT