Form 990s filed with the Internal Revenue Service remain the principal public window on 501(c)(4) social-welfare organizations that underwrite television, digital, and radio advertising around congressional votes to reauthorize Title VII of the Foreign Intelligence Surveillance Act, including Section 702. The statute, last extended in 2024 after a series of short-term continuing resolutions, has been the subject of floor fights, discharge petitions, and amendment packages in both chambers. According to the public record, several 501(c)(4)s reported program-service expenses and “independent expenditures” in years that coincide with those calendars.

The Internal Revenue Code does not require 501(c)(4)s to disclose the identity of contributors on Form 990. Schedules of grants, contractors, and media vendors appear instead. Filings available through the IRS Tax Exempt Organization Search and through state charity registries show line items for “public education,” “issue advocacy,” and payments to political consulting and media-buying firms. Those descriptions, according to practitioners who comment on the forms, can encompass ads that name members of Congress in the weeks before a recorded vote without expressly saying “vote for” or “vote against.”

FISA reauthorization packages have typically combined Title VII authorities with reforms to query procedures, amicus participation, and warrant requirements for U.S.-person queries. The Department of Justice and the Office of the Director of National Intelligence have publicly described 702 as a foreign-intelligence collection tool directed at non-U.S. persons overseas. Civil-liberties organizations and some members of the House Judiciary and Intelligence committees have alleged overcollection and “backdoor searches.” Ads paid for by 501(c)(4)s have tracked both frames: some spots, according to publicly archived creative, emphasize terrorism and foreign cyber threats; others emphasize Fourth Amendment language and inspector-general findings.

The Federal Election Commission’s independent-expenditure database and the Federal Communications Commission’s political-file rules capture a subset of the same spending when ads air on broadcast stations. 501(c)(4)s that stay within IRS “primary purpose” tests are not required to register as political committees. The result, according to campaign-finance lawyers who file comments on 990 instructions, is a reporting gap: a 990 may show a seven-figure media contract in the quarter of a FISA vote, while FEC reports show little or nothing if the spots are characterized as issue advocacy.

Inspector-general reports from the Department of Justice and the Intelligence Community have documented compliance incidents in 702 querying. Those reports are unclassified in summary form and have been cited in congressional hearings. 501(c)(4) advertisements have quoted or paraphrased those summaries. The record does not show that the groups obtained classified annexes. House and Senate intelligence committee leaders have stated that the underlying collection remains lawful when conducted under FISC orders.

Procurement of airtime is visible in station political files: invoices naming the 501(c)(4) or a media vendor, flight dates clustered around Rules Committee markups, and disclaimer language required by the FCC. Matching those invoices to 990 Part IX functional expenses is an exercise in timing rather than donor tracing. Several large 501(c)(4)s report related 501(c)(3) educational arms and 527 or super PAC affiliates. Transfers among related entities appear on Schedule R. Those transfers, according to the forms, can fund research used in ads without appearing as a direct political contribution.

State attorneys general who enforce charity registration have, in other contexts, sought donor lists under 26 U.S.C. § 6104 and state law. Courts have limited some of those demands. For FISA-related advertising, no widely reported docket shows a successful compelled disclosure of 501(c)(4) donors tied specifically to 702 spots. The public picture therefore remains vendor names, dollar totals, and calendar overlap with recorded votes.

Revolving-door filings with the Clerk of the House and the Secretary of the Senate show former intelligence-committee staff and agency lawyers registered to lobby on “FISA,” “electronic surveillance,” and “privacy.” Some of those registrants list 501(c)(4) clients. Lobbying reports under the LDA are quarterly and do not itemize ad buys. The 990s, by contrast, annualize the spending. Combining LDA, FEC, FCC, and 990 records produces a mosaic of influence without a single donor roster.

Budget justifications from the intelligence community, submitted to Congress and partially released, continue to treat 702 as a core collection authority. Those justifications do not address 501(c)(4) advertising. Members who voted for reauthorization have described the ads as outside noise; members who opposed have described them as a check on the committees. Neither characterization is a finding of fact in an IRS proceeding.

Form 990 Schedule C, when used, reports political campaign activity as a percentage of total expenditures. Many 501(c)(4)s active on FISA report zero or de minimis Schedule C activity while still listing large “communications” expenses. IRS examination statistics, published in the Data Book, do not isolate FISA-related filers. Exempt Organizations examinations remain a small share of returns filed.

The next reauthorization cycle, according to committee calendars and public statements, will again force a choice between short-term extensions and a multi-year bill. 501(c)(4)s that have already booked media in prior cycles are likely, based on past 990 patterns, to report similar contractor payments. The forms will again omit donors. Station files and FEC independent-expenditure reports, where they apply, will again provide the only contemporaneous public trail of who paid for which flight of ads targeting which members on which vote.

That is what the public budgets, inspector-general summaries, dockets, and 990s already show. They do not show classified source documents, and they do not name the individuals who wrote the checks.