There have been some changes in regards to what Rachel can accept with her fan mail. She can no longer accept gifts or larger items. Please have a look at the following post from the official website on more info https://rachelskarsten.com/updates-in-fan-postmail/
Rachel CAN however still accept letters and will do autographs for fans if you follow the instructions here
ATTENTION: Please be very careful about WHERE you get autographs from.
eBay and other similar sites are NOT the most reliable and the only places you know 100% are genuine are by going to conventions and getting them in person or through Rachel’s official fan mail process.