To a newcomer, electronic filing looks like one system: upload a PDF, pay a fee, receive a confirmation. In practice, filing in a federal court through CM/ECF and filing in a California Superior Court through an electronic filing service provider are different processes with different rulebooks. Confusing them is a reliable way to get a document rejected or to miss a requirement.

This overview compares the two for paralegals, legal assistants, and in-house counsel. Because rules vary by court and change over time, always confirm details in the specific court's current local rules and filing instructions.

What each system is

CM/ECF stands for Case Management/Electronic Case Files, the electronic filing and docketing system used by the federal courts. Filers register with the court for filing credentials, and public access to dockets and documents is generally through PACER, the Public Access to Court Electronic Records service. Each federal district and bankruptcy court operates its own CM/ECF instance with local procedures.

California state e-filing is governed by statutes and the California Rules of Court, along with each superior court's local rules and approved vendors. Courts typically accept filings through one or more electronic filing service providers, which charge their own service fees in addition to court fees. Which courts require e-filing, and for which case types, varies, and mandatory e-filing for represented parties is common in civil cases while rules for self-represented parties are often more flexible.

Key differences at a glance

  1. Accounts and credentials. CM/ECF filers usually register directly with each court and file under their own login, and the login functions as the signature in many contexts. In state court, the filer typically uses an approved service provider account, and the provider submits to the court.
  2. Who must e-file. Federal courts generally require attorneys to use CM/ECF, with exceptions for self-represented parties who may need permission. In California state court, mandatory e-filing depends on the court and case type, so check local rules.
  3. Format rules. Both generally require text-searchable PDFs, but caption format, line numbering, font, and margins differ. California state pleadings follow specific formatting rules, including requirements for pleading paper in many filings, while federal districts have their own local rules and sometimes judge-specific standing orders.
  4. Length limits. Federal districts set page or word limits for motions and briefs by local rule, and judges may modify them. California state court sets its own limits for certain motions and memoranda in the Rules of Court.
  5. Exhibits. Rules on exhibit indexing, bookmarks, and separate attachments vary. California requires bookmarking of electronic exhibits for certain motions, and federal courts often require each attachment to be separately described.
  6. Service. In federal court, CM/ECF often serves registered users automatically through a notice of electronic filing. In state court, electronic service rules and consent requirements are set by statute and rule, and proofs of service are typically still required.
  7. Timing. Both systems have rules on when a filing is deemed filed, such as transmission before midnight on a court day, but technical failures and acceptance procedures vary.

Mistakes that cross the line

Several errors occur when people carry habits from one system to the other:

  • Using the wrong event or document type, because the menus and naming conventions differ.
  • Assuming a state-court format works in federal court, or the reverse.
  • Forgetting sealed or confidential filing procedures, which differ in each system.
  • Missing a judge's standing order, which can override general local rules.
  • Omitting redactions of personal identifiers required by each court's privacy rules.

Build a court-by-court cheat sheet

The most reliable tool is a one-page reference for each court you file in regularly. Include the registration status, accepted vendors or portal, format rules, page limits, exhibit rules, service method, local contacts for technical support, and links to the current rules. Review it at least annually and whenever the court announces changes.

Our E-Filing Package includes a checklist that helps you compare requirements across courts before you submit.

Ready to streamline your filings? Download our E-Filing Package.

This article is general information, not legal advice, and does not create an attorney-client relationship. Consult a licensed attorney about your specific situation.