To make arrangements for White House cards, 
contact the office a month ahead of time:
Greetings Office
Room 39
The White House
Washington, D.C. 20500
Phone: (202) 456-7610 
Fax: (202) 395-1232
Link: https://sawho14.eop.gov/PERS?verified=1
Email: president@whitehouse.gov
Be sure to give names & addresses of 
recipients and date of the big event.