Getting Evidence You Sent It - USPS
about.usps.com › publications › pub370PS Form 3817 Do you need evidence to show that your letter or package was mailed? Use a Certificate of Mailing. Certificate of Mailing service provides a postmarked mailing receipt as evidence that your item was mailed. This is all you need to do: Complete PS Form 3817 at the time of mailing. Pay the applicable extra service fee.
Ps Form 3817 - Fill Out and Sign Printable PDF Template
Follow the step-by-step instructions below to eSign your certificate of mailing form: Select the document you want to sign and click Upload. Choose My Signature. Decide on what kind of eSignature to create. There are three variants; a typed, drawn or uploaded signature. Create your eSignature and click Ok. Press Done.