Usps Form 3817 - Web form 3818 by mail only. Use a certificate of mailing. Certificate of mailing service provides a postmarked. This certificate of mailing provides evidence that mail has been presented to usps® for mailing. Do you need evidence to show that your letter or package was mailed? When purchased at the time of mailing with certified mail, cod, insurance (for more than $200), or registered mail. Web access the most often used business mailer forms here.
Certificate of mailing service provides a postmarked. When purchased at the time of mailing with certified mail, cod, insurance (for more than $200), or registered mail. Do you need evidence to show that your letter or package was mailed? Web access the most often used business mailer forms here. This certificate of mailing provides evidence that mail has been presented to usps® for mailing. Use a certificate of mailing. Web form 3818 by mail only.