Only the original summons will have the seal. Copies of the summons (which is what is typically served) will not have the seal. Likewise, only the original summons is signed by the issuing court clerk. Copies of the summons will only have the stamped name of the issuing court clerk.
Does the summons bear a case number? That is what you'll need to file an Answer, Demurrer, or other responsive pleading.
You can look up the case status online at occourts.org if you are in Orange County Superior Court.
Frank W. Chen has been licensed to practice law in California since 1988. The information presented here is general in nature and is not intended, nor should be construed, as legal advice for a particular case. This posting does not create any attorney-client relationship with the author. For specific advice about your particular situation, please consult with your own attorney.
If you were served with a summons it should have accompanied other documents such as a complaint. You will have 30 days from the date of service to answer or otherwise respond to the complaint if it was personally served. If it was served by substitute service, look out for a copy in the mail because your response will be due 40 days from the date on the postmark.
I strongly suggest you consult with an attorney. Being sued is a serious matter and must be dealt with by a professional.
IMPORTANT NOTE: This response was prepared by Adina T. Stern, A Professional Law Corporation for informational purposes only and is not intended as legal advice. The information available in this answer is not intended to create, and receipt of it does not constitute, an attorney-client relationship. The information on legal issues available here is not a substitute for legal advice from an attorney who is familiar with all of the facts surrounding your particular situation who is licensed in the appropriate jurisdiction. This answer does not create an attorney-client relationship.