Occasionally in processing a green card return receipt gets lost. These are simple instructions to replace the card itself in your records with a usable alternative if you are not able to acquire the original.
Use the tracking number from the sending receipt or the top of your document sent to the recipient to track the number on https://USPS.com
Print the Search Results single sided showing with the tracking information showing it as received.
Print the Affidavit of Truth on the back of the tracking page.
Fill out the the Affidavit of Truth on the back of the tracking page and have it notarized.
Add the completed document to your set and keep it for your records in place of the green card return receipt.