Washington Proof of Mailing or Hand Delivery (for documents after Summons and Petition) is a form of proof of mailing or delivery of documents after a Summons and Petition are filed in a Washington state court. This proof of mailing or delivery is typically used to prove that a party has complied with the court's orders and/or to provide evidence of the date and time of service. There are two types of Washington Proof of Mailing or Hand Delivery (for documents after Summons and Petition): 1. Proof of Mailing: This type of proof of mailing requires the sender to submit a signed affidavit that states that the document was sent via the US Postal Service. The affidavit must include the sender's name, address, the date of mailing, a description of the document(s) mailed, and a statement that the document(s) were sent by first-class mail. 2. Proof of Hand Delivery: This type of proof of delivery requires the sender to submit a signed affidavit that states that the document was delivered in person. The affidavit must include the sender's name, address, the date of delivery, a description of the document(s) delivered, and a statement that the document(s) were delivered in person to the recipient.