Pre-Litigation Letters Are Dead in 2026. What Replaces Them

A Canadian applicant in the F2B preference category called the Immigration Answer Show on June 9 to ask whether a pre-litigation intent-to-sue letter, a writ of mandamus, or joining a coordinated class action was the right next move on a green card that had been sitting without a decision since a clean September 2025 interview. The attorney answer reorganized the sequence the immigration bar has reached for by default since the early 2000s.

The caller, identified on air as SP, had been raised in the United States, returned to Canada for school, and adjusted from inside the country as an F2B beneficiary after his parents naturalized. He listed no immigration violations, had a USCIS officer at his September 2 2025 interview tell him the case would be “pushed forward” within weeks, and had heard nothing in the nine months since.

The reason pre-lit letters worked, when they worked, was a market condition that no longer exists. A typical U.S. Attorney’s Office civil division ran a tractable docket of agency-defense cases — a handful of mandamus petitions at a time, the occasional APA challenge — and an intent-to-sue letter from a known practitioner was a credible signal worth ten minutes of someone’s time. That equilibrium has broken.

The replacement sequence Hacking walked the F2B caller through is a three-step decision tree that flips the order of the old defaults.

• First, sign up to be in the coordinated lawsuit. Class and organizational plaintiffs in APA challenges can produce relief — vacatur of the underlying policy under 5 U.S.C. § 706 — that no individual mandamus delivers. The Rhode Island ruling in Dorcas International Institute of Rhode Island v. USCIS on June 5 demonstrated the model: nationwide vacatur of four USCIS adjudication-pause policies in a single 135-page opinion.
• Second, wait 90 days. The waiting period lets the litigation take its first significant pre-trial motion. A preliminary injunction or a TRO before the court reorders the bargaining position of the agency before any individual filing is made.
• Third, file the individual mandamus. If the policy challenge has produced no movement and USCIS has not adjudicated the file, a mandamus under 28 U.S.C. § 1361 on the now-stale interview file remains available. Its leverage is greater after the APA challenge has reframed the agency’s posture.

The F2B caller’s situation also illuminates a mechanical layer of the stuck-case problem that most reporting on PM-602-0199 has missed. F2B — unmarried adult sons and daughters of lawful permanent residents under INA § 203(a)(2)(B) — is a numerically limited preference category. The June 2026 Visa Bulletin allocates a fixed annual quota across F2B applicants worldwide. An adjudicator who decides to approve an F2B I-485 cannot simply click “approved” — the file has to be paired with an available visa number pulled from the bulletin allocation and tagged in the USCIS case management system.

That mechanical step now sits with supervisors instructed under the May 21 memo to look for “balance of factors” reasons not to approve. The caller’s file is paused at the intersection of two adjudication problems: a clean interview that needs a discretionary sign-off, and a visa-allocation step that needs a supervisor to affirmatively pull a number from the bulletin.

The protective record for preference-category adjusters in the F2B position is narrower than the documentary file the May 21 memo’s discretionary factors demand. The Visa Bulletin date for F2B has been current for several months — meaning a visa number is available — and the September 2025 interview cleared on the merits. The applicant’s case for relief is procedural: the agency has had jurisdiction over an approvable file for nine months and has not acted on it.

The class-action lane Hacking referenced is the queued challenge to PM-602-0199 that his firm has telegraphed across multiple broadcasts. The first 39-country lawsuit produced Dorcas v. USCIS. A second 39-country case was filed June 8. The PM-602-0199 challenge is the third in the sequence, expected in the coming weeks. Applicants who join with their cases — providing factual predicates and standing — give the litigation the individual harm records that nationwide relief turns on.

The case for the individual mandamus does not disappear. For files without a discretionary policy overlay, where the only delay is agency processing time on a straightforward statutory entitlement, mandamus under § 1361 remains the appropriate tool. The Administrative Procedure Act, at 5 U.S.C. § 555(b), also provides a parallel “unreasonable delay” hook. What changed in 2026 is the priority order: collective relief first, individual relief second.

The market signal Hacking was reading is structural. The U.S. Attorney’s Offices defending USCIS in the District of Columbia, the District of Rhode Island, and the Southern District of Texas have all absorbed substantial new dockets across the asylum, parole-revocation, and habeas spaces since January 2025. A pre-lit letter, on a file that has been quiet for nine months, is not a credible threat in that environment. A complaint, filed and served, is.