I received a reply from the White House for the NT for Kids book I sent to First Lady Michele Obama back in February:
“We would like to extend our deepest thanks and appreciation for your generous gift. It is gratifying to know that we have your support. As we work to address the great challenges of our time, we hope you will continue to stay active and involved. Again, thank you for your kind gift.”
It was stamped with signatures from the President and First Lady.