Class actions allow one or more plaintiffs to sue on behalf of a larger group with similar claims. They're powerful tools for consumer + employment + securities cases — but face strict procedural requirements.
Federal Rule 23 — the framework
Class certification requirements (4 prerequisites): 1. Numerosity:
- Class so numerous that joinder impracticable
- Typically 40+ members
- No bright-line rule
- Geographic dispersion considered
2. Commonality:
- Common questions of law / fact
- Wal-Mart v. Dukes (2011) tightened standard
- Common contention capable of classwide resolution
- One "glue" question often enough
3. Typicality:
- Class representative claims typical of class
- Same legal theory
- Same factual pattern
- Different damage amounts OK
4. Adequacy:
- Class representative will fairly + adequately protect class
- No conflicts with class members
- Competent counsel
- Sufficient resources
Plus one of three Rule 23(b) categories
Rule 23(b)(1):
- Risk of inconsistent adjudications
- Or impair non-class members
- Limited fund cases
- Less common
Rule 23(b)(2):
- Injunctive relief class
- Class-wide remedy
- Civil rights cases
- Limited monetary relief
- Common in employment cases
Rule 23(b)(3) — "damages class" (most common):
- Common questions PREDOMINATE over individual
- Class action SUPERIOR to other methods
- Notice + opt-out rights to class
- Most consumer class actions
Predominance + superiority — the battle
Predominance:
- Common issues outweigh individual issues
- Damages calculations often dispute
- Comcast v. Behrend (2013) — damages must be susceptible to common proof
Superiority:
- Class action better than alternatives
- Manageability concerns
- Choice-of-law issues
- Difficulties listed in Rule 23(b)(3)(D)
Common types of class actions
Consumer class actions:
- False advertising
- Defective products
- Privacy violations (TCPA, BIPA, CCPA)
- Data breaches
- Pricing practices
- Service quality
Employment class actions:
- Wage + hour violations
- Discrimination patterns
- ERISA claims
- Misclassification
- Off-the-clock work
Securities class actions:
- Federal securities laws
- Misrepresentation in offerings
- Insider trading impact
- Specific procedures (PSLRA)
- Lead plaintiff procedures
Antitrust class actions:
- Price-fixing
- Monopolization
- Indirect purchaser claims (Illinois Brick)
- Federal + state laws
Civil rights class actions:
- Discrimination patterns
- Constitutional violations
- Voting rights
- Disability access
State class actions
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- Often parallel federal Rule 23
- Some states modified
- ${s.name}-specific procedures
- Different strategic considerations
- State law differences in remedies
Key procedural milestones
1. Complaint + class allegations:
- Define proposed class
- Detail claims
- Specific factual allegations
- Class representatives identified
2. Discovery:
- Class certification discovery
- Sometimes "phased" with merits
- Damages model development
- Class size + composition
3. Class certification motion:
- THE critical battle
- Plaintiff's burden
- Comprehensive briefing
- Often determines outcome
4. Notice to class:
- After certification
- Reasonable methods
- Opt-out rights
- Specific contents required
5. Settlement / trial:
- Settlement requires court approval
- Fairness hearing
- Class member objections
- Trial rare in class actions
Class Action Fairness Act (CAFA, 2005)
Federal jurisdiction expanded:
- Diversity jurisdiction expanded
- $5M+ aggregate amount
- Minimal diversity (1+ class member from different state than 1+ defendant)
- 100+ class members
- Most large class actions in federal court now
Effect:
- Forum-shopping reduced
- More uniform treatment
- Federal procedures + appeals
- Specific notice + settlement requirements
Settlement structures
Common class settlement features: Cash:
- Per-class-member payments
- Tiered (based on damages)
- Total settlement fund
- Often most valuable to lawyers
Coupons / vouchers:
- Less valuable to class
- CAFA scrutiny increased
- Sometimes appropriate (small claims)
Injunctive relief:
- Practice changes
- Often most valuable in employment / civil rights
- Hard to value monetarily
Future benefits:
- Extended warranties
- Discounts on future services
- Less valuable than cash
Attorney's fees
Common fee structures:
- Common-fund percentage (25-35% typical)
- Lodestar (hourly × multiplier)
- Court-approved
- Specific scrutiny in CAFA cases
- Class-member objections to fees
Class members' rights
Opt-out:
- Right to exclude self from class (Rule 23(b)(3))
- Specific procedures + deadlines
- Then can pursue individual case
- Or do nothing (lose claims)
Object:
- Object to settlement
- File written objections
- Appear at fairness hearing
- Court considers
Opt-in:
- For (b)(2) classes (injunctive)
- For some specific statutes (FLSA collective)
- Different mechanism
Defenses for businesses
Common defenses: 1. Class certification challenge:
- Most important battle
- Win = effectively eliminate class case
- Specific arguments per element
- Comcast damages issues
- Wal-Mart commonality
2. Arbitration clauses:
- Force individual arbitration
- Class-action waivers
- AT&T v. Concepcion enforcement
- Significant defensive tool
3. Standing challenges:
- Article III standing
- Concrete injury required
- Spokeo v. Robins (2016) implications
- Limited some statutory cases
4. Choice-of-law issues:
- Different state laws apply
- Manageability problem
- Defeats predominance
- Multi-state class actions
5. Individualized issues:
- Damage calculations differ
- Reliance individual
- Causation individual
- Liability defenses individual
6. Settlement strategy:
- Pick off class representatives
- Mass arbitration response
- Strategic offer of judgment
- Mootness issues
Recent developments
Trends:
- Increasing arbitration enforcement
- Mass arbitration response
- Tougher certification standards
- Specific industry focus (data, privacy, AI)
- BIPA biometric class actions (Illinois)
- TCPA continuing focus
- Privacy law expansion (CCPA, state laws)
Notable rulings:
- TransUnion v. Ramirez (2021) — concrete injury
- Cassirer v. Thyssen-Bornemisza (2022) — choice of law
- Ongoing Supreme Court attention
Public-policy considerations
For plaintiffs:
- Aggregation + economies of scale
- Otherwise unrecoverable claims
- Behavior change for defendants
- Access to justice
For defendants:
- Crushing exposure
- Settlement pressure
- High costs
- Sometimes meritless cases
- Reputational damage
What you should do
If you have potential class action claims in New Mexico: consult a class-action attorney to evaluate certifiability + lead plaintiff opportunities. If your business faces class action: hire experienced defense counsel immediately — class certification is the critical battle. Most major New Mexico firms handle class actions; some specialize as plaintiff or defense. Both sides expensive ($100K-$10M+ for full case).
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This guide is general information about federal + New Mexico law as of mid-2026 and is not legal advice. Class actions are highly technical. Talk to a licensed New Mexico attorney about your specific situation.