The Pennsylvania Certificate of Service is a document used to certify that certain legal proceedings have been served upon the recipient. This Certificate is used in civil proceedings in Pennsylvania, and is usually filed with the court as proof of service. There are three types of Pennsylvania Certificates of Service: Personal Service, Service by Certified Mail, and Service by Publication. Personal Service is when a legal document is served in person. Service by Certified Mail is when a legal document is sent by mail and the recipient is required to sign for receipt. Service by Publication is when a legal document is published in a newspaper to give notice of the proceedings to the recipient. The Pennsylvania Certificate of Service is a legal document that provides proof that a party has been properly served with legal proceedings.