QUESTION: "I need a receipt for my Supporting Membership transaction."
ANSWER: It was emailed to you on the day of your transaction by Crowdstack Pay—our site services provider who handles our secure and private transactions.
Look for an email from pay@crowdstack.com in your Inbox or Spam Folder 
If you still can't find it or accidentally deleted it, email us at contact.rotation@gmail.com, and provide the email address you used to register at this site. (Or, post a reply to this topic.)
Thanks for becoming a Supporting Member!