Need Envelopes? If you mail just a couple of claim forms, you can choose from our original ENV-9960 or the new ENV-9968. The ENV-9968 is designed to make mailing your claim forms faster and more efficient. If you mail several claim forms, choose the 12 1/2″ x 9″ large claim form envelope. Due to new postage regulations, the words “Do Not Bend” have been removed from the large Claim form envelope.