Koenig went missing earlier this month (Feb10), prompting his parents - former Star Trek actor Walter Koenig and his wife Judy - to launch a hunt for the ex-Growing Pains star.
They also issued an emotional plea to the 41 year old, begging him to get in touch amid mounting worries he had taken his own life.
Their worst fears were confirmed on Thursday when a group of Koenig's friends found his body in a park in Vancouver, Canada.
But the grieving couple has been overwhelmed by the touching notes they've received from members of the public, and plan to make a scrapbook with all the mementos.
A rep for the Koenigs says in an email to E! Online, "The Koenig family thanks you for your kind thoughts at this difficult time. It means a lot to them and they are very appreciative of the support they are receiving. Each of these emails will be printed and bound in a remembrance book."
Meanwhile stars have taken to Twitter.com pages to pay their respects to Koenig, with Star Trek's William Shatner leading the tributes by writing, "My deepest sympathies to Andrew Koenig's family. I will grieve with them."
Star Trek: The Next Generation actor Levar Burton adds: "Offering prayers for Walter & Judy Koenig as well as their beloved son, Andrew..."