A flow of funds works as a contractually binding payment roadmap: it lists every dollar coming into a closing, every recipient it must reach, and the exact order the payments happen in. The document is drafted before closing, signed off by the parties, and executed by a disbursing agent (usually an escrow officer, closing attorney, or bond trustee) who releases money only after every payee is documented, every account is verified, and every required authorization is in hand. Understanding how flow of funds works matters because a single misrouted wire or skipped priority tier can trigger breach-of-contract claims, tax penalties, or wire fraud losses that are effectively unrecoverable once the money settles.
What Has to Be in Place Before Any Money Moves
No disbursing agent will release capital until every payee’s identity and banking information are verified and on file. For domestic payees, that means a completed IRS Form W-9 capturing the recipient’s legal name and Taxpayer Identification Number so the paying party can report the transaction to the IRS.1Internal Revenue Service. About Form W-9, Request for Taxpayer Identification Number and Certification Foreign payees submit Form W-8BEN instead, which certifies non-U.S. status and, where applicable, claims a reduced withholding rate under a tax treaty. A foreign payee without a valid W-8BEN faces withholding at the default 30% foreign-person rate.2Internal Revenue Service. Instructions for Form W-8BEN Domestic payees without a valid W-9 face 24% backup withholding on the payment.3Internal Revenue Service. Publication 15 (2026), (Circular E), Employers Tax Guide
Banking details sit right next to the tax forms in importance. Domestic wires require the nine-digit ABA routing number for the receiving bank and the specific account number. International payments require a SWIFT code, an 8-to-11-character identifier that routes money to the correct overseas institution. Every account number should be verified against a bank-issued letter or voided check rather than an email, because a single transposed digit can send funds to the wrong account with limited recourse. Escrow agents or closing attorneys often consolidate all banking details into a signed settlement statement so every party can review the numbers in one place before anything moves.
Corporate Authorization
When a company is sending or receiving funds, the disbursing agent needs proof that the person signing off actually has authority to act for the entity. That usually means corporate resolutions authorizing the transaction and an incumbency certificate confirming the names, titles, and signature authority of the company’s officers. The corporate secretary typically signs the incumbency certificate, and if it needs to work across borders or satisfy a bank’s due diligence, notarization is common. Missing these documents is one of the most frequent reasons closings get pushed back. Banks will not process a seven-figure wire on the say-so of someone who cannot prove they are authorized to commit the company.
Compliance Screening Before Release
Federal law requires every financial institution to verify who it is dealing with before processing a transaction. Under 31 U.S.C. ยง 5318, banks must maintain a customer identification program that verifies the identity of anyone opening an account or moving significant funds. At a minimum, that means collecting a name, address, date of birth for individuals, and an identification number, then verifying that information through reasonable, risk-based procedures.4Office of the Law Revision Counsel. 31 US Code 5318 – Compliance, Exemptions, and Summons Authority For corporate parties, verification often extends to articles of incorporation or organizational documents. The Bank Secrecy Act separately requires institutions to maintain records of certain transactions and report suspicious activity.5FinCEN.gov. The Bank Secrecy Act
Compliance officers also screen every party against the sanctions lists maintained by the Office of Foreign Assets Control. OFAC’s search tool checks names against the Specially Designated Nationals List and several consolidated sanctions lists.6Office of Foreign Assets Control. Sanctions List Search Tool A match does not just delay the transaction. OFAC can require the bank to block the funds entirely, freezing them in place. Blocked property must be reported to OFAC within 10 business days, and the funds cannot be released without a specific license. Sanctions violations carry civil penalties adjusted upward for inflation annually, and in some cases criminal penalties.7Office of Foreign Assets Control. Basic Information on OFAC and Sanctions
The practical upshot is to provide clean, accurate identification documents early. A misspelling that creates a false sanctions match or a missing corporate document can stall the entire closing while the compliance team resolves the issue.
The Payment Waterfall
Once the paperwork clears, money moves in a fixed order set by the governing legal agreement, whether that is a trust indenture for a bond deal or a credit agreement for a leveraged loan. This priority structure is called a waterfall because money flows from the top tier downward, and lower tiers only get paid after the tiers above them are fully satisfied.
The typical order looks like this:
- Administrative expenses first. Payments to the trustee, legal counsel, and auditors come off the top because these parties keep the deal’s legal and operational infrastructure running.
- Senior debt service next. Principal and interest owed to the highest-priority lenders are paid before any junior claims. Senior creditors accept lower interest rates in exchange for that first claim on revenues.
- Reserve fund replenishment. Most indentures require a debt service reserve fund as a cushion. For tax-exempt municipal bonds, that reserve is generally capped at the lesser of 10% of the bond issue’s principal, the maximum annual debt service, or 125% of average annual debt service. If the reserve has been tapped, funds flow here to refill it before anyone below gets paid.8National Association of Bond Lawyers. Debt Service Reserve Fund
- Subordinate debt and equity last. Junior debt holders and equity investors sit at the bottom. They earn higher returns when things go well precisely because they are last in line when revenue falls short. In a lean period, these participants may receive nothing.
These priorities are contractually binding and enforceable in court. Skipping a tier or paying out of order can constitute a breach of contract or trigger an event of default, which can accelerate the entire outstanding debt and give senior creditors immediate remedies.
How the Wires Actually Get Sent
Once the flow of funds statement is finalized, the disbursing agent submits wire instructions to the bank. What follows is a multi-layered security process designed to prevent unauthorized transfers.
Callback Verification
Before releasing a large wire, many banks contact a designated authorized signer on a pre-verified phone number to confirm the instructions. The signer provides a passcode or passphrase as additional identity proof. This callback is deliberately separate from whatever channel delivered the original instructions. If a fraudster compromised the email chain, the phone verification catches the discrepancy.
Dual Control
Most institutions also enforce a dual-control process, sometimes called the maker-checker principle. One person initiates the wire (the maker), and a separate person reviews and approves it (the checker). Neither can complete the transaction alone. That segregation of duties means internal fraud requires collusion between two people, which is far harder to pull off and far easier to detect. Every step is logged with timestamps and user identities, creating an audit trail.
Fedwire and ACH
High-value, time-sensitive payments typically move through the Fedwire Funds Service, which operates from 9:00 p.m. ET the previous calendar day until 7:00 p.m. ET on the current business day. The deadline for transfers benefiting a third party, which covers most closing-related wires, is 6:45 p.m. ET.9Board of Governors of the Federal Reserve System. Fedwire Funds Services Fedwire settles each transfer individually and in real time, meaning the recipient’s bank receives final, irrevocable funds almost immediately. Each transfer gets a unique IMAD (Input Message Accountability Data) number that both sender and receiver can use to track the payment.
Lower-value or less time-critical payments may move through the ACH network instead. Same-day ACH has three processing windows, with submission deadlines at 10:30 a.m., 2:45 p.m., and 4:45 p.m. ET, settling at 1:00 p.m., 5:00 p.m., and 6:00 p.m. ET, respectively.10Federal Reserve Financial Services. FedACH Processing Schedule ACH is cheaper than Fedwire but processes in batches rather than individually, which makes it less suitable for closings where parties need confirmation within minutes. After funds are released through either system, the disbursing agent reconciles the actual transfers against the flow of funds statement and files proof-of-payment records with the trustee or closing attorney.
Where the Money Gets Lost
This is where the most money disappears in the entire flow of funds process, and most participants do not see it coming. Business email compromise, where a fraudster impersonates a closing attorney, title agent, or lender and sends fake wire instructions, is one of the costliest forms of financial fraud in the country. The FBI’s Internet Crime Complaint Center has flagged BEC as a multi-billion-dollar problem that specifically targets real estate transactions and corporate closings.
The mechanics are straightforward. A hacker gains access to an email account involved in the deal, monitors the correspondence, and waits until the moment wire instructions are being sent. They then send modified instructions from the compromised account or from a nearly identical spoofed address, changing the bank routing and account numbers. Because the email looks legitimate and the timing is perfect, the recipient sends funds to an account controlled by the fraudster. Once a wire settles, recovery is extremely difficult.
A few protective habits do most of the work:
- Never trust wire instructions received by email alone. Always verify wiring details by calling the sender at a phone number you looked up independently, not one included in the email.
- Treat last-minute changes as red flags. An urgent request to update wire instructions, especially late on a Friday afternoon, is the single most common fraud pattern.
- Check the full email address. Fraudsters routinely change a single character in the domain name. Read the address character by character, not just the display name.
- Use encrypted portals. Many title companies and escrow agents now transmit wire instructions through secure online portals rather than email, eliminating the interception risk.
If you suspect a wire was sent to a fraudulent account, contact your bank immediately and request a recall. Speed matters enormously; funds recovered in the first 24 hours have a far higher return rate than those pursued days later. File a report with the FBI’s IC3 as well.
When a Wire Goes to the Wrong Account
Even without fraud, wires occasionally get misdirected because the beneficiary’s name and account number in the payment order identify different people. Under UCC Article 4A-207, the beneficiary’s bank can rely on the account number as the correct identifier and is not required to verify that the name and number match. If the bank does not know the two refer to different people, it is protected from liability after depositing funds into the account matching the number.11Legal Information Institute. UCC 4A-207 – Misdescription of Beneficiary
The loss usually falls on the originator, the party who sent the wire with inconsistent instructions. If the originator is not a bank and can prove the person who received the funds was not entitled to payment, the originator can avoid liability, but only if the originator’s bank failed to warn them that beneficiary banks process wires by account number regardless of the name. Most banks include this warning in their wire agreements, which shifts the risk squarely onto the sender.11Legal Information Institute. UCC 4A-207 – Misdescription of Beneficiary Triple-check the account number. The name on the wire is essentially decorative once it hits the receiving bank’s system.
After the Wires Settle
The flow of funds does not end when the money arrives. Several federal reporting obligations kick in afterward, and missing them creates problems that surface months later during tax season or an audit.
Form 1099-S for Real Estate Closings
If the transaction involves real estate, the settlement agent or closing attorney is generally responsible for filing Form 1099-S to report the sale to the IRS. Unlike many other 1099 forms, there is no minimum dollar threshold for reporting real estate transactions. Any sale or exchange of an ownership interest in land, buildings, condominiums, cooperative housing stock, or timber interests triggers the filing requirement.12Internal Revenue Service. Instructions for Form 1099-S The reporting obligation extends to transfers under land contracts (reportable in the year the contract is signed) and even sales made under threat of condemnation.
Interest on Escrow Accounts
When funds sit in an interest-bearing escrow account during a closing, any interest earned above $10 in a calendar year triggers a Form 1099-INT filing requirement. The $10 threshold is measured per recipient across all accounts held under the same Tax Identification Number. If your closing stretched over several months and the escrow balance was substantial, expect a 1099-INT and plan for the tax impact.
Record Retention
Federal regulations require financial institutions to retain records related to funds transfers for five years.13eCFR. 31 CFR 1010.430 – Nature of Records and Retention Period Keep your own records at least as long. That means the flow of funds statement, wire confirmations with IMAD numbers, signed settlement statements, W-9 or W-8BEN forms, and any correspondence confirming the banking details you used. If a dispute surfaces two or three years later about whether a payment was made or where it went, these records are your proof.