What's different here
- The W-9 is collected at account opening, under CIP. Customer Identification Program rules already require name, date of birth, address and TIN, so the TIN is on file; the failure mode is a TIN that was collected but never certified or never matched, or a name that changed without the record following.
- C-Notices apply. The IRS notifies payers of interest and dividends when a payee has under-reported, requiring backup withholding on those accounts until the IRS says stop. Vendor-only payers never see these; institutions need a process for them.
- The second-annual-solicitation rule for missing TINs interacts with account-opening rules: for accounts opened before 1984 and certain other cases the solicitation history is different, and the institution's legacy records are the evidence.
- Backup withholding is on interest and dividends, so it is applied by the core system at payment, not by AP, and reconciled on Form 945 with deposits that can run daily. A missed withholding flag on a high-balance account is a large liability quickly.
- 1099-K obligations apply to institutions acting as payment settlement entities, at the $20,000 / 200-transaction threshold, on top of the customer-account forms.
- FATCA and chapter 3 reach every non-U.S. account holder: W-8 collection, 1042-S reporting, and Form 8966 for reportable accounts. The W-9/W-8 decision at onboarding drives both regimes.
Financial institutions file most of the information returns in the country, under rules written for them in 1983.
The forms a financial institution files
| Form | What it covers here | Threshold (2026 payments) | To the IRS | The trap in this sector |
|---|---|---|---|---|
| 1099-INT | Deposit and bond interest | $10 ($600 in the course of a trade or business) | February 28 on paper, March 31 electronically; recipient copy January 31 | Backup withholding from the first dollar on an uncertified or notified account; the account-opening W-9 is the control. |
| 1099-DIV | Dividends and distributions, including liquidating distributions | $10 | February 28 on paper, March 31 electronically; recipient copy January 31 | The IRSAC asked in 2020 for liquidating distributions to be allowed on 1099-B instead; the 1099-DIV remains the form. |
| 1099-B | Broker proceeds and cost basis | Any amount | February 28 paper, March 31 electronic; recipient copy February 15 | The highest-volume form in existence and the one where name-line parsing errors multiply fastest in IRIS. |
| 1099-R and 5498 | Retirement distributions and contributions | $10 (1099-R) | March 31 electronic (1099-R); May 31 (5498) | 1099-R fraud was 45 percent of ISAC scheme alerts in 2020; ETAAC has asked since 2021 for a January 31 due date. |
| 1099-C | Debt discharged: charge-offs, settlements, the 36-month nonpayment test | $600 | February 28 on paper, March 31 electronically; recipient copy January 31 | The year is fixed by the identifiable event, not the bookkeeping; the Tax Court cases below are all about the year. |
| 1099-K | Merchant acquiring: card settlements, no threshold | Any amount for card transactions | February 28 on paper, March 31 electronically; recipient copy January 31 | Merchant TINs are solicited at underwriting; a missing one is a withholding duty on every settlement. |
| 1042-S | Deposit interest paid to nonresident aliens (since 2013), FDAP paid to foreign account holders | None ($10 for NRA deposit interest) | March 15 | Florida Bankers (below): the rule could not be challenged in advance and stands. |
A bank's backup withholding is applied by the core system and reconciled on Form 945 at the institution level; the 945 matching program compares it to box 4 across every form type. The C-Notice (CP543) is the one notice unique to this sector: the IRS, not the payer, orders withholding on a specific customer for underreported interest and dividends.
Where a financial institution's notices come from
- Legacy accounts. Accounts opened before the W-9 was certified, or before the bank's current core, carry names keyed differently from the IRS record; the name control is what the IRS actually compares.
- Acquisitions and conversions. Every merger re-keys millions of names. PLR 201308024 (below) lets the successor rely on the transferred W-9 records if the chain of custody is kept; a conversion that drops the certification date loses the reasonable cause defense with it.
- Trusts, estates and custodial accounts. The TIN belongs to the person whose income it is: the grantor, the estate, the minor. CCA 201221018 (below) applies to every deceased-customer account.
- Joint accounts. The first-named owner's TIN is the one matched; a joint account certified by the second owner only is uncertified for withholding purposes.
- Scale. A CP2100 of more than 250 entries arrives on an encrypted CD by mail, which the IRSAC has asked the IRS to replace since 2022; the CP2100 guide covers the timing and the what the IRS will and won't do page the calls.
The checks that sit on top of the TIN
- Customer Identification Program. The CIP record is where the legal name and TIN come from; the IRS match is a separate step the CIP does not perform, and a CIP-verified name can still fail the IRS name control.
- FATCA and chapter 3. Every account holder is either a W-9 or a W-8 customer; the FATCA guide and the chapter 3 guide cover the documentation that keeps a foreign account out of the 1099 and backup withholding system, and the W-8 validity calculator the expiry.
- Sanctions. OFAC screening at opening and on every list update; the screening guide covers the regime, and the OFAC enforcement action finder holds the 37 bank actions since 2015: filters set to exact match only, bank identifiers never loaded, monthly rescreens the bank thought were daily, and alerts closed on a middle name.
- Qualified intermediary status. Institutions acting as QIs reconcile Forms 1042 and 1042-S against their custodians; the IRSAC's January 2026 report asks for a de minimis tolerance because the reconciliation can take years.
What a mature program looks like
- TIN matching of every new account pair within days of opening, with a code-3 workflow that reaches the customer before the first interest posting.
- Annual bulk re-match of the account base ahead of 1099 season, with corrections applied before the file is generated.
- A CP2100 process with an owner, a business-day calendar, and a system flag for B-Notice status; a C-Notice process alongside it.
- OFAC screening at onboarding and on list updates (already a BSA requirement), sharing the same customer record as the TIN result.
- A solicitation log the compliance team can produce per customer, going back at least three years, for the inevitable 972CG.
A worked example: the conversion that lost the dates
A bank converts cores and migrates 2.1 million deposit accounts. The conversion carries the name and TIN but not the W-9 certification date. The next CP2100 lists 14,000 accounts, 3 percent more than the prior year, because truncated names were re-keyed. The bank solicits, gets 9,000 corrections, and withholds on 5,000.
The 972CG proposes 14,000 returns at $340, $4,760,000, capped at $4,191,500, with the 6722 penalty capped again. Reasonable cause under Reg. 301.6724-1 requires showing the initial solicitation (the certified W-9 at opening) and the annual solicitations; without the certification dates the bank cannot show the initial solicitation for the converted accounts and is left arguing the IRS's own rules for pre-1984 accounts and the exception in Reg. 31.3406(d)-1Treas. Reg. 31.3406(d)-1Treasury regulations, Cornell LII account by account.
PLR 201308024 is the rule the bank should have followed: carry the image, the date and the certification status across with the account.
Annual maximum at the $340 rate: $4,191,500, or $1,397,000 for a filer with average gross receipts of $5 million or less. Section 6722 charges the same amounts again for the payee statements. Returns due in 2027, Rev. Proc. 2025-32. Full tables: the 972CG estimator and the figures page.
Questions banks and brokers ask
A customer certified the W-9 at opening in 1998. Do we re-solicit?
Not unless the IRS tells you to. A certified account is solicited once; the annual solicitation duty arises after a CP2100 or 972CG for that account, and the second-annual-solicitation rule then applies. The solicitation rules page has the sequence.
The IRS sent a C-Notice on a customer. What do we withhold on?
Interest, dividends and the other reportable payments the notice names, at 24 percent, until the IRS tells you to stop; the customer cannot stop it by giving you a new W-9. The C-Notice guide covers the CP543 and CP544 pair.
Can we rely on an introducing broker's W-9?
Yes, under an agreement that designates the introducing broker as your agent for the purpose, with the reliance spelled out (PLR 200107027); the introducing broker's representation of name and TIN satisfies the reasonable cause rules for an incorrect TIN.
We migrated accounts in a merger. Do we need new W-9s?
No, if the predecessor's W-9 records (image, date, TIN, certification status) and procedures came across and you can show it (PLR 201308024). Re-solicit only the accounts with no record.
When is a charged-off card balance a 1099-C?
On the identifiable event: a settlement, a formal discharge, the running of the limitations period, or the 36-month nonpayment presumption if you have not rebutted it. The Tax Court has fixed the year by each of those in the cases above; the 1099-C topic in the finder has them.
A nonresident alien customer signed a W-9. Are we protected?
Your reliance is protected if you had no reason to know otherwise (Park); the withholding and 1042-S duty still attached to the payments, and the customer's false certification is the IRS's evidence against the customer, not against you. Document the U.S. indicia you relied on.
What the IRS and the courts have said about banks and brokers
- Florida Bankers Association v. U.S. Department of the Treasury, 799 F.3d 1065 (D.C. Cir. 2015): the 2012 regulation requiring banks to report deposit interest paid to nonresident aliens could not be challenged before enforcement; because the 6721 penalty is treated as a tax, the Anti-Injunction Act requires a bank to pay the penalty and sue for a refund.
- Private Letter Ruling 200107027: a clearing broker may rely on the introducing broker's representation that a W-9 was obtained, on its name and TIN data, on its withholding instructions and on a faxed or electronic W-9; the agency rules in Reg. 31.3406(d)-4Treas. Reg. 31.3406(d)-4Treasury regulations, Cornell LII and (h)-3 make the reliance explicit.
- Private Letter Ruling 201308024: after two brokers contributed their businesses and imaged W-9s to a new partnership, the successor could rely on the transferred records and need not re-solicit.
- Private Letter Ruling 200450003: a bank's pooled investment accounts are not joint accounts; it documents, withholds on and reports each participant separately and needs no W-8IMY for the pool.
- Peretz v. United States (Fed. Cl. 2020): $121,288 a broker backup withheld from a nonresident alien's sale proceeds was recoverable only by a timely refund claim; withholding is deemed paid on April 15 of the following year and the two-year look-back ran.
- Jacobowitz, Rodriguez, Newman and Gaffney (Tax Court, 2010 to 2023) (docket record): four 1099-C cases: the expiration of the limitations period, a written charge-off policy and the 36-month presumption each fixed the year of discharge; a 1099-C with the wrong name at an old address and a bare 'the form is correct' letter did not carry the IRS's burden.
- Private Letter Rulings 200131027 and 202319009: a balance cancelled automatically by the contract's own terms is not a discharge requiring a 1099-C; a write-off agreed in a class action settlement is, even when a court signs the order.
- Private Letter Ruling 199909032: IOLTA interest paid to a legal services foundation: an exempt recipient is exempt from reporting, not from backup withholding on a defective certificate, and anything actually withheld must be reported on a 1099-INT.
The 1099-C, backup withholding and foreign payee topics of the finder hold the rest. GAO's first information reporting review (GGD-88-110, 1988) was about banks' TINs on interest returns; the oversight page traces the program from there.