Can I file a motion to quash if the proof of service is fake?
Yes, but in California a motion to quash is usually the right vehicle only if your theory is that service was defective or invalid as a matter of statutory compliance. If you believe the proof of service is false or fraudulent, you can still raise that issue in a motion to quash, but you will generally need to support it with competent evidence and, depending on posture, may need to combine it with or consider a motion to set aside a default or void judgment. Cal. Code Civ. Proc. § 418.10 [1]
Bottom line
A defendant may move to quash service of summons for lack of personal jurisdiction. Cal. Code Civ. Proc. § 418.10(a)(1) [1] California courts also recognize that challenges to the validity of service can be raised by motion to quash and, in some circumstances, by other post-default motions where the alleged service defect renders the judgment void. Dill v. Berquist Constr. Co., 24 Cal. App. 4th 1426 (1994) [2]
If the proof of service is “fake” in the sense that it falsely states service occurred, the core issue is not merely technical defect; it is whether service was actually accomplished at all.
How California treats the issue
1. Motion to quash is proper if service was not validly accomplished
Under Cal. Code Civ. Proc. § 418.10(a)(1) [1], a defendant may move to quash service of summons for lack of personal jurisdiction. If the proof of service is fraudulent, that may support the argument that service never occurred, meaning the court lacks jurisdiction.
Dill v. Berquist Constr. Co., 24 Cal. App. 4th 1426 (1994) [2] explains that when service is challenged, the plaintiff bears the burden of proving valid service. The court also noted that service defects can be attacked by motion to quash, and that only valid service confers personal jurisdiction. Dill v. Berquist Constr. Co., 24 Cal. App. 4th 1426 (1994) [2]
2. A proof of service is not conclusive if you can impeach it
The filing of a proof of service may create a rebuttable presumption of proper service, but that presumption can be overcome by contradictory evidence. Dill v. Berquist Constr. Co., 24 Cal. App. 4th 1426 (1994) [2] If you have evidence the proof is fabricated, you can present declarations, records, or other evidence showing the alleged service did not happen.
3. If there is a default or default judgment, you may need more than a motion to quash
If a default has already been entered, a motion to quash may still be relevant if you have not appeared, but California practice often also involves a motion to set aside a void default or default judgment where service was never valid. Cal. Code Civ. Proc. § 473(b) [3] Dill v. Berquist Constr. Co., 24 Cal. App. 4th 1426 (1994) [2]
Practical framing
A stronger formulation is usually:
- Motion to quash for lack of personal jurisdiction, supported by evidence that service never occurred; or
- Motion to set aside void default/default judgment, if the case has already proceeded to default.
Important point
A mere suspicion that the proof of service is fraudulent is not enough by itself. You will want evidence such as:
- your own declaration denying receipt;
- evidence the address was wrong;
- records showing the purported server was not present;
- inconsistencies in the proof of service;
- proof the process server or declarant could not have made service.
Short answer
Yes, you can file a motion to quash if you think the proof of service is fake or fraudulent, because the motion is a proper way to challenge personal jurisdiction and invalid service. If a default has already been entered, you may also need to seek relief from that default or from any default judgment. Cal. Code Civ. Proc. § 418.10 [1] Cal. Code Civ. Proc. § 473(b) [3]