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United States · Federal appellate briefing

When must the designated appellant serve and file its cross-appeal principal brief?

FRAP 28.1(f)(1) requires the designated appellant’s principal brief to be served and filed within forty days after record filing. Under Rule 28.1(b), the first notice filer is ordinarily the appellant; if notices are filed the same day, it is the plaintiff below. Agreement or court order may change those roles. Establish the actual role before using this scoped period.

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Period
Forty calendar days after record filing under Rule 28.1(f)(1)
Trigger
Filing of the record after the Rule 28.1 appellant role is independently established
Rule
FRAP 28.1(f)(1)
Federal Rules of Appellate Procedure

December 1, 2025 compilation

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Which filing or service starts this briefing stage?

Confirm that a cross-appeal was filed.

Establish the Rule 28.1(b) appellant, including any agreement or court order.

Verify actual record filing under Rule 12(c).

Read actual briefing directions and prepare the principal brief.

FRAP 28.1(f)(1)

How is the forty-day principal-brief period counted?

  1. Establish the Rule 28.1 appellant role.
  2. Verify and exclude the record-filing day.
  3. Count forty calendar days.
  4. Check final-day holidays, inaccessibility and actual directions.

Exclude the verified record-filing day and count forty calendar days under Rule 26(a)(1). If the final day is Saturday, Sunday or a legal holiday, continue to the next open day. The filing-based period does not attract Rule 26(c) merely because a record copy was served.

Rule 26(a)(6) includes the listed federal holidays and days declared holidays by the President or Congress. For periods after an event, it also includes holidays declared by the state of the district court that rendered the challenged judgment or order, or the circuit clerk’s principal office. Establish the actual applicable calendar and inaccessibility. The national preset does not infer additional state holidays or granted relief.

FRAP 26(a)(4)–(6), (b) and (c)

What does a worked calculation look like?

Fictitious example

In a fictitious cross-appeal, the record is filed July 8, 2026. The Rule 28.1 appellant role is already established. Exclude July 8 and count forty days. August 17 is the assumed open final day, without another state holiday, inaccessibility or different direction.

Example counting steps
StepWhat is countedDate
TriggerRecord filing in the scoped cross-appealJuly 8, 2026
CountForty calendar days after filingAugust 17, 2026
Example resultMonday, August 17, 2026

Fictitious dates. Establish the actual cross-appeal role and directions separately. The date does not prove accepted filing, required service or sufficient brief contents.

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Which qualifications affect the briefing stage?

Role designation
Rule 28.1(b) ordinarily designates the first notice filer as appellant. For same-day notices, the plaintiff below is appellant. Agreement or court order may modify these designations.
Serve and file
Rule 28.1(f)(1) requires both service and filing of the appellant’s principal brief within the applicable period.
Original principal brief
Rule 28.1(c)(1) addresses the appellant’s principal brief. Later response and reply stages have distinct contents and service-based triggers.
Actual record filing
Under Rule 12(c), the circuit clerk files the received record, partial record or district clerk certificate and notifies the parties of the filing date. Notice filing is a separate event.
FRAP 28.1(f)(1)
  • This guide does not read local rules or orders, infer service or delivery, determine an appeal’s merits or grant relief.
  • Confirm actual briefing roles, separate service and current circuit requirements before using a national default.

What should I check before completing this act?

Common questions

Briefing roles, events and service

Who is appellant when notices are filed the same day?

Rule 28.1(b) designates the plaintiff below, subject to a different agreement or court order.

FRAP 28.1(a)–(c)

Does the first notice filing start these forty days?

Rule 28.1(f)(1) uses record filing. Notice filing helps identify the briefing role but is a different event.

FRAP 28.1(f)

Must I serve the principal brief as well as file it?

Yes. Rule 28.1(f) expressly requires briefs to be served and filed under its timing sequence.

FRAP 28.1(f)

Official sources and scope

Provisions used (9)
Provisions used in this guide
ProvisionPurpose
FRAP 28.1(f)(1)This stage’s required acts, timing and qualifications
FRAP 31(a)(1)–(2)Distinct national procedure and scope
FRAP 28.1(a)–(c)Distinct national procedure and scope
FRAP 28.1(f)Distinct national procedure and scope
FRAP 12(c)Distinct national procedure and scope
FRAP 26(a)Calendar counting and inaccessibility
FRAP 26(a)(4)–(6), (b) and (c)Filing boundary, holidays, extensions and service additions
FRAP 25(a)Filing channels and brief dispatch exception
FRAP 25(b)–(d)Separate service and proof
Read the official Appellate Rules compilation

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