Service of Process for LLC: What Arrives and When to Answer

The document that opens a lawsuit against your LLC does not say "lawsuit" on the front. In Texas it is headed Citation. In federal court and in most state courts it is a Summons. It carries a court name, a case number, the name of the party suing you, and a printed date — and that printed date is when the clerk issued the paper, not when anything of yours is due.

That mismatch is the whole reason this page exists. Owners read the date on the face, decide there is time, and set the envelope down. Meanwhile the only date that matters is the one nobody printed: the day service happened.

What is in the packet, and what is not a packet at all

Two documents do the work. The summons or citation says an action exists and that a response is required. The complaint or petition is the story: who the plaintiff says you are, what they say you did, and what they want. Everything else in the envelope is supporting cast — exhibits, a civil cover sheet, sometimes a first set of discovery requests served alongside the complaint so that a second clock starts the same day.

The federal rule spells out the pairing. An LLC is served by delivering a copy of the summons and of the complaint to an officer, a managing or general agent, or any other agent authorized by appointment or by law to receive service of process, under Rule 4(h)(1)(B) — and, where the agent is one authorized by statute and the statute so requires, by also mailing a copy of each to the defendant (read 10 September 2026). One without the other is a defect worth pointing out to a lawyer, and not something to act on by yourself.

Now the thing that is routinely mistaken for service and is not. Under Rule 4(d) a plaintiff may write to a defendant, say that an action has been commenced, and ask the defendant to waive service of a summons. That request has to arrive with a copy of the complaint, two copies of the waiver form appended to Rule 4, a prepaid means of returning it, and at least 30 days to send it back. No process server is involved. It looks alarming and it is not service.

The consequences run both ways. A defendant who timely returns a waiver need not serve an answer until 60 days after the request was sent, under Rules 4(d)(3) and 12(a)(1)(A)(ii). A defendant located in the United States who fails, without good cause, to return a waiver requested by a plaintiff located in the United States meets a court that must impose the expenses later incurred in making service, plus the reasonable expenses of any motion required to collect them, under Rule 4(d)(2). Whether to sign is a decision with consequences past the calendar, and it belongs on the same phone call as everything else on this page.

Other official-looking paper reaches a registered agent and is not a lawsuit at all: a subpoena for records in someone else's case, a garnishment order, a state tax notice, a demand letter drafted to resemble a pleading. Sorting them takes about ninety seconds once you know what a summons looks like.

Where the clock starts is not where the envelope lands

Five jurisdictions, five different answers, and none of them keyed to the day you personally read anything.

Federal court. A defendant must serve an answer within 21 days after being served with the summons and complaint — Rule 12(a)(1)(A)(i), read 10 September 2026. The 60-day and 90-day variants apply only where service was waived under Rule 4(d).

California. The summons itself must contain a direction that the defendant file a written pleading in response within 30 days after the summons is served (Code Civ. Proc. section 412.20(a)(3), read 10 September 2026). The instruction is printed on the paper, which is the one place people reliably do not look.

New York. CPLR 320(a) sets the appearance at 20 days after service of the summons, and at 30 days where the summons "was served on the defendant by delivering it to an official of the state authorized to receive service in his behalf." Service on the secretary of state is that first kind, so an LLC reached that way has 30 days. (The rule separately lists a "section 303," but that is the CPLR's own section 303, about nonresidents who have designated an attorney — a different provision from the LLC Law section of the same number.) Read LLC Law section 303 slowly, because it contains the sentence that surprises people most: service of process on the limited liability company "shall be complete when the secretary of state is so served." The secretary of state then sends a copy by certified mail, return receipt requested, to the post office address on file. Your 30 days began in Albany, and the mail arrives somewhere inside them (both read 10 September 2026).

Delaware. In the Superior Court a defendant must serve an answer within 20 days after service of process and complaint (Super. Ct. Civ. R. 12(a), read 10 September 2026). Which Delaware court a suit against an LLC lands in is not automatic, and the deadline that binds you belongs to the court printed on your papers.

Texas. The number lives in the procedural rules rather than the entity code, and it is a weekday rather than a count. The citation must direct the defendant to file a written answer "on or before 10:00 a.m. on the Monday next after the expiration of twenty days after the date of service thereof" (Tex. R. Civ. P. 99(b), read 10 September 2026). Rule 99(c) requires that same instruction to be printed on the citation as a notice to the defendant, so it is on the paper in your hand.

One Texas provision belongs here only because it is so often read as a deadline and is not one. Where service goes through the secretary of state, BOC section 5.252(b) says the notice "is returnable in not less than 30 days" (read 10 September 2026). That sets a floor on the return date of the process — the date it goes back to the court — and does not give the company 30 days to answer. The answer date still comes from Rule 99(b).

Four states and one federal court do not add up to a national rule, and the other forty-six states each set their own. Two places hold the answer wherever you are: the direction printed on the face of the summons, and that state's rules of civil procedure, which every state judiciary publishes on its own site. This page stops right here. Which number applies to your packet, whether service was properly made, and what to file are questions for an attorney licensed in that state, and the reason to call today rather than Thursday is that every one of these counts is already running.

Who is allowed to accept it besides your agent

The registered agent is a designated recipient, not the only lawful one, and this is where "we were never served" usually falls apart.

Texas provides that for the purpose of service each manager of a manager-managed LLC and each member of a member-managed LLC is an agent of that company as a matter of law (BOC section 5.255(3)). No appointment, no filing, no consent form — the statute simply says so. A member taking a packet on a Saturday morning is the company being served. The same chapter adds that it "does not preclude other means of service of process, notice, or demand" provided by other law (BOC section 5.256, read 10 September 2026), so a list like this one is a floor and not a closed set.

Delaware describes the physical act in more detail than most owners expect. Legal process may be delivered personally to any manager of the LLC in Delaware or to the registered agent, or left at the dwelling house or usual place of abode in Delaware of such a manager or individual agent, or at the registered office or other place of business of the company in the state. A copy left rather than handed over must be delivered at least six days before the return date of the process, in the presence of an adult person, and the serving officer has to state the manner of service in the return (6 Del. C. section 18-105(a), read 10 September 2026).

California writes its list as an addition rather than a replacement: section 17701.16 applies "in addition to" the general service chapter of the Code of Civil Procedure, so the routes it names are extra ones and not the only ones. Personal delivery is valid on any individual the company designated as agent, or, where the designated agent is a corporate service, on any person named in that service's latest certificate filed under Corporations Code section 1505 — and no change in the agent or in the agent's address takes effect until the statement of information is amended (Corp. Code section 17701.16(a) and (b), read 10 September 2026). The consequence of a stale filing there is not a penalty. It is a valid delivery to a place you left.

Your agent forwards to the address you gave it

Read the Texas duty clause slowly, because it is narrower than the service most people think they are buying. The only duties of a registered agent are to receive or accept process and forward it to the address most recently provided to the agent by the entity, or otherwise notify the entity at that address (BOC section 5.206(a), read 10 September 2026). Not to reach you. Not to try twice. To send it to the address in their file.

Delaware writes the same obligation into its agent standards — accept service of process and other communications and forward the same to the company — and adds a line that quietly rules out the cheapest version of that business: a registered agent may not perform its duties solely through a virtual office, a mail forwarding service, or both (6 Del. C. section 18-104(e), read 10 September 2026). Texas requires an organization serving as agent to keep an employee available at the registered office during normal business hours to receive service (BOC section 5.201(d)).

So the weak link is a field in a portal most owners sign into once a year, if that. What sits in it is often a person who left, an alias nobody reads, or the address of an office given up two moves ago — and nothing in the renewal forces anyone to look, because the invoice buys the agent's presence in the state, not the accuracy of your contact record. Open the portal, open the contact record, and read the email and mailing addresses as if a summons were about to be sent to them, because one might be. If you serve as your own agent the same audit applies to your street address on the public record, and the trade-offs of doing that job yourself are worth rereading before the next renewal invoice arrives.

When there is no agent, the state becomes one

Substituted service is the mechanism that turns a lapsed filing into a default judgment, and it is why switching agents without leaving a gap matters more than the price difference between two services.

Texas lists the triggers plainly. The secretary of state becomes an agent of the entity for service when a filing or foreign filing entity fails to appoint or does not maintain a registered agent, or when the agent cannot with reasonable diligence be found at the registered office — and, for foreign entities, when the registration is revoked or the company transacts business without registering (BOC section 5.251). The plaintiff delivers duplicate copies with the fee, and the secretary of state must immediately send one copy to the entity, addressed to the most recent address on file with that office, by certified mail with return receipt requested (BOC sections 5.252 and 5.253, read 10 September 2026).

Delaware reaches the same place by a different road. If the serving officer cannot by due diligence serve under section 18-105(a), process may be served on the Secretary of State, and that service is as effectual as any of the direct methods. The Secretary then notifies the company by letter to its address as it appears in the state's records or, if no such address appears, at its last registered office, using a mail or courier service that produces a signed delivery record. The plaintiff serves in duplicate and pays a statutory fee — $100 under 6 Del. C. section 18-1105(a)(13) as that provision read on 10 September 2026, taxed as part of the costs if the plaintiff prevails.

Delaware also connects this to something a lot of owners have already lived through. When a registered agent resigns without a successor and the company does not designate a replacement within 30 days, the certificate of formation is canceled and service of legal process goes to the Secretary of State from that point on (section 18-104(d)). An unpaid agent invoice ends, eventually, in certified mail sent to whatever address the state has. If the entity is already in trouble on the filing side, the reinstatement route and this route are running at the same time and neither waits for the other.

California is the outlier and the useful counterexample. Service on the Secretary of State there is not automatic: the agent must have resigned without replacement, or be unfindable with reasonable diligence at the designated address, and the plaintiff has to show by affidavit that process cannot be served with reasonable diligence before a court will order it. When that order issues, service "shall be deemed complete on the 10th day after delivery of the process to the Secretary of State," who then forwards it to the principal office by registered mail with request for return receipt (Corp. Code section 17701.16(c) and (d), read 10 September 2026).

New York states the underlying design most directly of the four. Every domestic LLC designates the Secretary of State as its agent for service, and the biennial statement sets out "the post office address within or without this state to which the secretary of state shall mail a copy of any process accepted against it" (LLC Law section 301(e)(1), read 10 September 2026). That biennial filing is not administrative housekeeping. It is the forwarding address for lawsuits. Checking that the state still shows the entity as it should — and what good standing actually means — is a five-minute job that pays off on exactly this day.

The first hour is about dates, not about the merits

Nothing you write down in that hour argues your side of anything. It preserves the facts a lawyer will ask for in the first four minutes of the call, and those decay fast.

Photograph or scan the entire packet, every page, including the envelope, and keep the envelope itself — the postmark and the delivery record can matter later. Write down the court name exactly as printed, the case number, the county or district, and the name of the party suing. Then the service facts: who physically took the papers, where they were standing, the date and time of day, and whether delivery was by hand, left with someone, sent by certified mail, or forwarded by a state office. If it came through your registered agent, save the transmittal message with its timestamp — that timestamp is evidence about the agent's forwarding, not about your deadline.

Then call an attorney licensed in the state where the case was filed — not the state the LLC was formed in, unless those are the same. If the packet also names you personally as a defendant, say so on that call, since the deadlines for the company and for the individual can differ and each one is separate.

One thing not to do while you wait: nothing. If the papers reached you through a Secretary of State, the mailed copy is the slow half of a delivery that legally already happened, and the counting started at the state's counter.