Rule 1033.Amendment.
Adopted June 25, 1946 · Last amended September 6, 2024 · Last verified June 30, 2026
Full Text of Rule 1033
Plain-English Summary
This rule keeps pleadings flexible. A party, by the adverse party’s filed consent or by leave of court, may at any time change the form of action, add a person as a party, correct the name of a party, or otherwise amend a pleading. Leave to amend is liberally granted absent prejudice.
Timing of the change can matter for limitations. An amendment correcting the name of a party already sued relates back to the original filing, and substituting a defendant’s actual name for a Doe designation relates back as the rule provides.
The mechanics require transparency. A motion to amend attaches both a clean copy of the proposed amended pleading and a comparison copy that strikes through deletions and underlines additions, with the clean copy controlling if the two differ.
Frequently Asked Questions
Can I amend my complaint?
Yes. By the adverse party’s consent or by leave of court, a party may at any time change the form of action, add a party, correct a name, or amend the pleading. Leave is liberally granted unless the amendment would prejudice the other side.
Does an amendment relate back to the original filing?
An amendment correcting the name of a party already sued relates back to the commencement date only if, within 90 days after the period for commencing the action, that party received notice of the suit so that it will not be prejudiced in defending on the merits and knew or should have known the action would have been brought against it but for a mistake about identity. Similar conditions govern substituting a defendant’s real name for a Doe designation under the rule.
Official Note
Historical Commentary The following commentary is historical in nature and represents statements of the Committee at the time of rulemaking: Explanatory Comment—2013 Rule 1033 has been amended to specifically state that an amendment may add a person as a party. It is the practice of litigants and trial courts to refer to Rule 1033 when a party seeks to amend a pleading to add another party. The purpose of this amendment is to eliminate any uncertainty as to whether a motion to amend a pleading to add an additional party is governed by Rule 1033. There is no conflict between this proposed amendment and Rule 2232(c) because the latter addresses the question of when a court may order the joinder of any additional person. Subdivision (b) of Rule 2232 addressing the joinder of an additional party is being rescinded. The provision is unnecessary because if a party has been misjoined or no claim for relief is asserted, a dismissal should be sought through the rules governing preliminary objections, judgment on the pleadings, and summary judgment. If a plaintiff wants to drop a defendant, he or she should use the rules governing the discontinuance of an action. Explanatory Comment—2017 Currently, the Rules of Civil Procedure do not expressly permit an amendment correcting the name of a party against whom a claim is asserted to relate back without a showing of concealment when the statute of limitations has expired and the effect of that correction operates to add another party. However, case law has interpreted the Rules to permit such an amendment within the statute of limitations. Rule 1033 has been amended to expressly permit amendments correcting the name of the party against whom a claim is asserted to relate back to the date of the commencement of the action if within ninety days after the period provided by law for commencing the action, the party to be brought in by the amendment has received notice of the commencement of the action such that it will not be prejudiced in obtaining a defense on the merits, and the party knew or should have known that the action would have been brought against the party but for a mistake concerning the identity of the proper party. Consider the following example: Harry Roberts, who resides at 949 Alcoma Street, Pittsburgh, PA, was the driver of an automobile which struck the plaintiff when he was crossing the intersection at Grant and Forbes Street, Pittsburgh, PA, at approximately 11:00 a.m. on October 11, 2013. The plaintiff’s complaint, filed on October 2, 2015, mistakenly identifies the driver as Henry Rosen. He is the only named defendant in the complaint. On October 7, 2015, the Sheriff made service by serving Mary Roberts at 949 Alcoma Street, Pittsburgh, PA. She is described in the Sheriff’s Return as the wife of the defendant. On January 2, 2016, the complaint is amended to correct ‘‘Henry Rosen’’ to ‘‘Harry Roberts.’’ The amendment of Rule 1033 expressly permits the plaintiff to amend the complaint to correct the name of the defendant to Harry Roberts, because it is clear from the body of the complaint that the plaintiff was suing the driver of the automobile which struck the plaintiff and service of the complaint furnished sufficient notice to Harry Roberts that a lawsuit has been initiated against him for actions he is liable for even though the defendant is identified on the complaint as Henry Rosen. This is consistent with existing case law and codifies current practice. The Federal Rules of Civil Procedure and a majority of states have rules of procedure governing the relation back of amendments, which are similar to this amendment. The interests of justice are served by a rule of civil procedure permitting a party to correct a complaint that provides an incorrect name of a party when there is no prejudice to the party brought in by the amendment. The amendment of Rule 1033 does not alter the concealment doctrine and the discovery rule. The amendment is intended to cover situations in which neither the concealment doctrine nor the discovery rule apply.
Amendment History
The provisions of this Rule 1033 adopted June 25, 1946, effective January 1, 1947; amended December 20, 2013, effective January 23, 2014, 44 Pa.B. 8; amended February 2, 2017, effective April 1, 2017, 47 Pa.B. 937; amended January 24, 2019, effective April 1, 2019, 49 Pa.B. 608; amended September 6, 2024, effective January 1, 2025, 54 Pa.B. 5978. Immediately preceding text appears at serial page (395794).