I noticed the documented fields described here:
h t t p s : / / developer.apple.com/library/ios/releasenotes/General/ValidateAppStoreReceipt/Chapters/ReceiptFields.html#//apple_ref/doc/uid/TP40010573-CH106-SW1
Don't seem to be present in the receipt dictionary I get back from the server. For example expiration_date is not present. Is the documentation outdated?