Petitioner filed this qui tam action in the name of the United States against respondent city and several of its officials under the False Claims Act (FCA), 31 U. S. C. §3729. The Government declined to exercise its statutory right to intervene, the District Court dismissed the complaint and entered judgment for respondents, and petitioner filed a notice of appeal 54 days later. Federal Rule of Appellate Procedure 4(a)(1)(A) and 28 U. S. C. §2107(a) require, generally, that such a notice be filed within 30 days of the entry of judgment, but Rule 4(a)(1)(B) and §2107(b) extend the period to 60 days when the United States is a “party.” The Second Circuit held that the 30-day limit applied and dismissed petitioner’s appeal as untimely.

Held: When the United States has declined to intervene in a privately initiated FCA action, it is not a “party” to the litigation for purposes of either §2107 or Rule 4. Because petitioner’s time for filing a notice of appeal in this case was therefore 30 days, his appeal was untimely. Pp. 3–9.