I have already sent 12 envelopes and received 6 feedbacks.It is not surprising.Usually it takes 3 months to receive something back.
16.12.2014-Thomas Brodie-Sangster,Chandler Riggs
29.12.2014-Josh Hutcherson,Jennifer Lawrence,Johnny Galecki,Jim Parsons,Dylan O´Brien and the last two I do not remember :P
11.2.2015-Steven Yeun,Andrew Lincoln,Jake Short
14.5.2015-I bought online on eBay personalized signature of Chandler Riggs
13.5.2015 On Facebook "my personalized autograph for sale in case you can't make it to a convention" -Chandler Riggs
6.2.2015-Chandler Riggs autographed photos with dedication "To:Adriana"
23.4.2015-Andrew Lincoln autographed photos with dedication and green paper