Rule 11 “Reasonable Inquiry” Is Fact-Dependent; Borrowed Allegations from Related Complaints May Be Pleaded on Information and Belief Without Direct Witness Interviews

A. Precedents Cited

The opinion’s reasoning is built from three sources: Colorado pleading doctrine, Colorado Rule 11 precedent (limited), and federal Rule 11 decisions used as guidance because C.R.C.P. 11 closely parallels the federal rule.

1. Colorado pleading and motion-to-dismiss framework

• Kluge v. Wilson, 448 P.2d 786, 787 (Colo. 1968): The Court invoked Kluge to reiterate that a complaint’s principal purpose is notice. This notice orientation under C.R.C.P. 8(a) makes it harder to justify importing evidentiary demands (like mandatory witness interviews) into pleading practice.
• Warne v. Hall, 2016 CO 50, ¶ 24, 373 P.3d 588, 595: The Court referenced Warne for Colorado’s adoption of the plausibility standard on C.R.C.P. 12(b)(5) motions. The Court used this to emphasize that plausibility is not proof and that discovery often supplies details controlled by defendants.
• Jagged Peak Energy Inc. v. Okla. Police Pension & Ret. Sys., 2022 CO 54, ¶ 24, 523 P.3d 438, 446: Cited for the standard of review of dismissals under C.R.C.P. 12(b)(5) (de novo), reinforcing that the Court was addressing legal sufficiency and rule interpretation rather than factual adjudication.
• Mason v. Farm Credit of S. Colo., ACA, 2018 CO 46, ¶ 7, 419 P.3d 975, 979: Used to anchor the de novo interpretive approach to the Colorado Rules of Civil Procedure and the principle that rules are construed to secure the “just, speedy, and inexpensive” determination of actions (C.R.C.P. 1(a)).

2. Colorado Rule 11(a) authority

• People v. Trupp, 51 P.3d 985 (Colo. 2002) ("Trupp I"): The Court relied on Trupp I to frame Rule 11 as focusing on pre-filing behavior, personalizing responsibility through the attorney’s signature, and defining the inquiry as: (1) reading the pleading; (2) reasonable inquiry into factual and legal assertions; and (3) proper purpose. Importantly, Trupp I supports the proposition that Rule 11 review is not outcome-based; it asks whether the threshold was met when filing.
• In re Trupp, 92 P.3d 923 (Colo. 2004) ("Trupp II"): Cited for the “objective reasonableness” standard and the principle that bad faith is not required for a violation. The Court’s discussion of what constituted adequate investigation in Trupp II (reviewing files, talking to knowledgeable persons, checking orders/records, independent calculations, legal research) served as a concrete reference point: Rule 11 expects real work, but not any single mandated step in every case.
• Stepanek v. Delta Cnty., 940 P.2d 364, 370 (Colo. 1997): Used to emphasize Rule 11’s systemic purpose—safeguarding the judicial process by compelling truthful pleadings and meritorious legal arguments.

3. Federal Rule 11 guidance adopted by analogy

Because C.R.C.P. 11 and Fed. R. Civ. P. 11 both impose a “reasonable inquiry” obligation, the Court looked to federal decisions illustrating that the adequacy of investigation turns on context.

• In re Teva Securities Litigation, 671 F. Supp. 3d 147 (D. Conn. 2023): The Court found Teva closely analogous. There, plaintiffs recycled allegations (including confidential witness material) from related actions, and the district court deemed Rule 11 satisfied where counsel investigated sources, relied reasonably on government investigations, and pleaded on information and belief with an expectation that discovery would supply support. The Colorado Supreme Court treated Teva as a persuasive model for evaluating “borrowed” allegations.
• de la Fuente v. DCI Telecomms., Inc., 259 F. Supp. 2d 250, 260 (S.D.N.Y. 2003): Quoted in Teva for the notion that reliance on certain information (notably governmental investigations) may carry stronger evidentiary indicia. The Colorado Court used this to validate reliance on public/government sources as part of a reasonable inquiry.
• Garr v. U.S. Healthcare, Inc., 22 F.3d 1274 (3d Cir. 1994): Defendants invoked the line of cases cautioning against copying without investigation. The Court did not reject Garr; instead it read Garr as reinforcing that courts must consider “all the material circumstances.” The key was that Garr sanctioned copying where attorneys made little effort to review accessible underlying materials and lacked time constraints—facts not mirrored in Houser’s record.
• CTC Imports & Exports v. Nigerian Petroleum Corp., 951 F.2d 573, 578 (3d Cir. 1991): Cited through Garr to confirm that reasonable inquiry may depend on whether the signer relied on forwarding counsel or another lawyer—supporting collaboration and reliance, but not abdication.
• In re BankAtlantic Bancorp, Inc. Securities Litigation, 851 F. Supp. 2d 1299 (S.D. Fla. 2011): Used to illustrate two complementary points: (1) the duty is “non-delegable” in the sense that the signing attorney must analyze the factual/legal basis, but (2) the attorney need not personally gather every fact. It also illustrates that later witness contradictions often present credibility issues rather than automatic Rule 11 violations—unless a reasonable inquiry would have revealed a clear mismatch.

4. Related litigation referenced as factual context (not controlling precedent)

• In re CenturyLink Sales Practices & Securities Litigation, 403 F. Supp. 3d 712 (D. Minn. 2019) ("CenturyLink") (parallel MDL; source of “cramming” allegations and confidential witness assertions).
• State v. CenturyTel Broadband Services, LLC, No. 02-CV-17-3488 (Minn. Dist. Ct., Cnty. of Anoka) (Minnesota AG action; public affidavits used as exhibits).
• Heiser v. CenturyLink, Inc., No. CV2017-008928 (Az. Super. Ct., Cnty. of Maricopa) (whistleblower action; public filings reviewed).
• Houser v. CenturyLink, Inc., 2022 COA 37, 513 P.3d 395 ("Houser I") (initial appeal; remand allowed amendment on “cramming” omissions theory; cautionary note about pleading borrowed material as facts and after reasonable inquiry).
• Houser v. CenturyLink, Inc., 2024 COA 96, 559 P.3d 677 ("Houser II") (second appeal; held incorporation of confidential-witness allegations permissible if appropriate investigative steps taken; no direct witness interview requirement).

B. Legal Reasoning

1. The Court separated pleading sufficiency from Rule 11 enforcement

A core feature of the opinion is its insistence that C.R.C.P. 11(a) is not a backdoor heightened pleading rule. Defendants’ approach urged courts to strike (or disregard) “copied” allegations at the C.R.C.P. 12(b)(5) stage unless plaintiffs could show (in the complaint itself) that counsel personally verified sources—especially by speaking to confidential witnesses. The Court rejected this as incompatible with:

• C.R.C.P. 8(a)(2) (short and plain statement; notice pleading),
• C.R.C.P. 8(e)(1) (express permission to plead on information and belief), and
• Warne v. Hall plausibility (a screen for speculative claims, not a demand for proof).

In practical terms, the Court refused to require plaintiffs to (a) plead “substantial evidence” pre-discovery, or (b) narrate investigative steps in the complaint as a condition of proceeding.

2. “No bright-line rule”: reasonable inquiry is context-specific

The Court’s rule is deliberately flexible: counsel must do “a sufficient investigation” to support allegations “at least on information and belief,” and whether the inquiry is “objectively reasonable” depends on the circumstances. This framing:

• Avoids a categorical permission to “copy freely,” because copying is merely one fact in the overall inquiry.
• Avoids a categorical prohibition, recognizing that direct access to confidential witnesses may be impossible (e.g., non-cooperative witnesses, protective orders, practical barriers, or the fact that identities are unknown).

3. The Court validated “investigating the sources” rather than “re-interviewing every witness”

Applying its standard, the Court emphasized what Houser’s counsel actually did, as represented in the amended complaint:

• Reviewed SEC filings, press releases, earnings calls, analyst reports, and media reports;
• Reviewed publicly filed materials in related cases (including the whistleblower case);
• Reviewed investigations by state attorneys general;
• Spoke with plaintiffs’ counsel in related actions;
• Attached affidavits from four named customers (from a public docket).

This combination mattered. The Court treated it as corroborative scaffolding that elevated the amended complaint above mere “plagiarized” assertions. In effect, the Court accepted that a reasonable inquiry can be built from reliable public materials, governmental investigative outputs, and counsel-to-counsel diligence—without requiring the duplicative step of re-contacting every confidential witness.

4. Preservation of Rule 11’s deterrent function

The Court also addressed the policy critique: that permitting borrowed allegations would allow out-of-state counsel (or unknown investigators) to create allegations Colorado courts cannot police. The Court answered with two points:

• Its rule still requires Colorado counsel to make an independent, objectively reasonable inquiry—meaning the signer remains accountable.
• Colorado courts retain “tools necessary” to sanction violations of Colorado procedural and ethical rules.

Thus, the Court did not weaken Rule 11; it clarified the type of inquiry that can satisfy it in multi-forum litigation.

C. Impact

1. Litigation practice: clearer permission for informed reliance on parallel proceedings

The decision provides practical guidance for complex cases where information is distributed across multiple proceedings. Plaintiffs’ counsel may use allegations from related lawsuits—including confidential-witness allegations—without automatic Rule 11 exposure, provided counsel performs a context-appropriate investigation (reviewing underlying public sources, government investigations, filings, and other corroborative materials).

2. Pleading stage: limits on using Rule 11 as a dismissal lever

The Court’s reasoning narrows attempts to convert Rule 11 into a pleading filter at the C.R.C.P. 12(b)(5) stage. Defendants may still pursue Rule 11 sanctions if allegations are unsupported, but this opinion discourages courts from “subtracting” allegations solely because they were borrowed, absent a contextual inquiry into counsel’s investigation.

3. Securities and class actions in Colorado state court

Because the case arises in a securities class action context and explicitly discusses copying allegations from federal MDL pleadings, the opinion likely increases confidence in Colorado state courts as forums where plaintiffs can plead plausibly using public and related-case materials—especially when defendants control key facts. The Court nonetheless reaffirmed the gatekeeping role of trial courts applying plausibility and Rule 11 standards.

4. A practical “checklist” effect (without making it mandatory)

Although the Court rejected bright-line requirements, its application section implicitly signals what kinds of steps help satisfy Rule 11 when incorporating outside allegations:

• Identify investigative sources (public filings, regulatory filings, media/analyst materials);
• Rely on governmental investigations where available;
• Consult counsel in related actions;
• Include or attach public evidentiary materials (e.g., affidavits) where feasible;
• Plead on information and belief with an expectation of discovery support, consistent with C.R.C.P. 8(e)(1).