B2B Invoice Recovery Methods, Ranked by Speed

TL;DR

• Selling the claim to Delos AI pays you fastest. You get roughly 80% of face value in immediate cash, with no contingency wait and no legal exposure.
• An attorney demand letter costs little and can trigger payment in days, but a debtor who ignores it leaves you with nothing and the clock still running.
• A collections agency handles volume on contingency of 20–33%, yet recovers only 20–30% on average because it cannot sue.
• Factoring advances 70–90% in a day, but the reserve waits on the debtor and recourse risk stays with you.
• Small claims and full litigation win judgments but take weeks to years, and a judgment is not the same as payment.

Why Speed Is the Real Variable in Invoice Recovery

Every day a B2B invoice sits unpaid, your odds of collecting the full amount drop. Once invoices reach the 90 to 180 day range, 28.36% of them get written off entirely. Most recovery paths stretch across months and still end in uncertainty. A collections agency works your account for weeks. A demand letter buys a response window that the debtor can ignore. Litigation runs 18 to 24 months and can cost more than the claim itself.

That delay is why this list ranks methods by days-to-cash, not by how much you could theoretically recover if everything goes right. The fastest method and the best method are different questions. The best method might return the highest percentage after a year of pursuit. The fastest method puts money in your account before the debt ages into the write-off zone. If you need certainty this month rather than a maybe next year, speed is the variable that actually decides your outcome.

How We Ranked These Methods

Three questions decide where each method lands on this list, and none of them is "which provider has the best reputation."

First, days to cash in hand. A method that eventually recovers full value but takes 18 months ranks below one that pays in 48 hours. Second, cost certainty. A fixed discount you agree to upfront beats a contingency percentage that only applies if collection succeeds, or a legal bill that grows month over month. Third, minimum viable claim size. Some methods only make economic sense above $50,000, which rules them out for the invoices most businesses actually chase. Every ranking below reflects those three outcomes, in that order.

Recovery Methods, Ranked by Speed

Each method below turns a past-due invoice into cash at a different speed and a different level of certainty. The order runs from fastest and most certain to slowest and least predictable, so you can match a method to how quickly you need the money and how much risk you can carry while you wait.

#1 — Sell the Claim to Delos AI (Immediate Cash)

Selling the claim to Delos AI puts money in your account now, at a fixed price, with no wait for a debtor to cooperate and no legal exposure left on your side.

Quick overview. You transfer the past-due claim to Delos for a lump sum of roughly 80% of face value. Once the sale closes, the debt is off your books and the payment is yours to keep regardless of whether the debtor ever pays. Delos then pursues collection on its own account.

When to use it. Reach for a claim sale when certainty matters more than squeezing out the last dollar, or when chasing the debtor yourself would cost more in time and legal fees than the invoice is worth. A claim sale fits businesses that want the recovery closed today rather than an open case running for months.

What it costs. You give up about 20% of face value. Delos can offer that price because it automates the full litigation stack, from amicable outreach through small claims and lien-related matters. According to Delos, that automation makes claims profitable to pursue that would be uneconomic for you to litigate, since attorney retainers alone run $25,000 to $50,000 for even a simple contract dispute. The 20% discount buys you finality that no contingency arrangement can match.

Limitation. You accept a discount to face value, so a claim sale is not the right move when the debtor is likely to pay in full within days on a demand letter alone.

Move-on trigger. If the claim is fully disputed on the merits or the debtor has already entered bankruptcy, sell price and timeline may shift, so compare a claim sale against writing the balance off entirely.

#2 — Attorney Demand Letter (Days to Response)

An attorney-drafted demand letter can move a debtor in days when the only thing missing is a credible threat. The letter states the amount owed, the legal basis, a payment deadline, and what happens if the deadline passes. Most commercial letters set a window of 10 to 14 days, short enough to create urgency without signaling that you can be waited out.

Quick overview. A formal notice on law-firm letterhead demanding payment by a set date, with the legal theory and next step spelled out.

When to use it. Reach for it when the debtor has money and simply hopes you will give up. A letter that references your contract's fee-shifting and late-fee terms tells the reader you have the documents and understand the remedies, which is the signal a self-sent email cannot carry. Attorneys describe these letters as litigation-ready because they are built around the case you would actually file.

What it costs. A few hundred dollars in drafting fees, and those fees can be folded into the demand itself when your contract includes a fee-shifting clause.

Limitation. The letter has no teeth on its own. Some debtors ignore demands entirely, and others only respond once litigation is filed. While you wait, the statute of limitations keeps running, and a claim can eventually expire if you sit on it too long.

Move on when. The deadline passes with silence or a lowball offer. At that point you need a party that can actually pursue the claim, not another warning.

#3 — Commercial Collections Agency (Weeks to Months)

A collections agency hands your overdue accounts to someone else's staff, which makes it the traditional choice for finance teams that have too many past-due invoices to chase in-house. Agencies like ABC-Amega and Caine & Weiner work on contingency, so you pay nothing upfront and owe a percentage only when they collect. That structure feels safe, but it hides two problems that cost you time and money.

Quick overview. You place the account, and human collectors call and send letters until the debtor pays or the file closes.

When to use it. High volumes of routine accounts where you can wait weeks or months and no single invoice justifies legal action.

What it costs. Agencies typically charge 20% to 33% contingency on what they recover (stevensricci.com). The fee only stings when they succeed, and success is the harder problem.

Limitation. Agencies cannot file lawsuits, obtain judgments, place liens, or levy bank accounts (stevensricci.com). A sophisticated debtor knows this and treats agency calls as background noise, because nothing behind the demand can force payment. Recovery rates reflect that gap. Traditional agencies average roughly 20% to 30% on commercial accounts, while attorney-led firms average around 70% to 75% (stevensricci.com).

Move-on trigger. The debtor disputes the debt or stalls past 90 days with no payment. Agencies close disputed files rather than litigate performance, so a debtor who claims the service was not delivered can end the process without paying a cent.

#4 — Invoice Factoring / Debt Factoring (24–48 Hours Advance, But Conditional)

Factoring puts cash in your hands within a day, but it never buys your problem outright. A factoring company advances 70% to 90% of the invoice face value, sometimes within 24 hours, then holds back a reserve. You only see that reserve after your customer actually pays, minus a fee that runs 1% to 5% of invoice value per month. On a past-due B2B invoice, the debtor is exactly the party least likely to cooperate, so the reserve can sit unpaid indefinitely.

Quick overview. Sell your invoice to a factor for an upfront advance, wait for the reserve after the debtor pays.

When to use it. You want quick working capital against invoices that are current or lightly overdue, and the customer still pays reliably.

What it costs. The fee compounds monthly, and most arrangements are recourse.

Limitation. Recourse factoring is the most common type, which means you must buy the invoice back if the debtor doesn't pay within about 90 days. The default risk never leaves your balance sheet. Owners often sign a personal guarantee on top of that.

Move-on trigger. The invoice is already deep past due, or the factor demands recourse and a guarantee.

The structural gap matters more than the speed. Factoring advances money against a debt you still own. Selling the claim to Delos AI ends the matter with one lump-sum payment for roughly 80% of face value, and the recourse risk transfers with the sale. Delos pursues the debtor itself, so there is no reserve to wait for and no buyback clause hanging over you.

#5 — Small Claims Court (Weeks to a Hearing, Months to Cash)

Small claims court gives you a cheap, lawyer-free way to sue, but the dollar caps make it useless for most B2B invoices. In Washington, individuals can sue for up to $10,000, yet businesses and corporations are capped at $5,000. Oregon sets a $10,000 ceiling and requires you to make a good-faith effort to collect before you file.

Quick overview. You file the claim yourself, appear at a short hearing, and argue your own case. Attorneys are barred from most small claims proceedings in both states.

When to use it. Reach for small claims when the invoice sits under your state's business cap and the debtor has assets you can actually reach.

What it costs. Washington filing fees run $35 to $50, and you can add court costs to the claim if you win.

Limitation. Winning a judgment is not the same as getting paid. In Oregon, you become the "Judgment Creditor" and take on all collection efforts yourself. The court does not garnish wages or seize accounts for you, so you file more paperwork and pay more fees to chase your own money.

Move-on trigger. Skip small claims when the amount exceeds your state's cap, or when the debtor is likely to force the case into a higher court where their lawyer takes over. At that point the DIY advantage disappears, and you need a method that carries follow-through.

#6 — Commercial Litigation (Months to Years)

Quick overview. Full commercial litigation offers the highest recovery ceiling and the slowest, most expensive route to reach it. Business litigation attorneys bill $300 to more than $1,000 per hour, and even a simple contract dispute demands a retainer of $25,000 to $50,000 before any work starts.

When to use it. Litigation only makes economic sense above a high dollar threshold, where the claim size clears the cost of pursuing it. An 18 to 24 month case can total $500,000 to $1,000,000 in fees alone.

What it costs. The math turns against you fast. A $400,000 claim that runs up $550,000 in legal fees and settles for $300,000 leaves you with a net loss of $250,000, an outcome the source describes as happening regularly under hourly billing.

Limitation. Winning and getting paid are separate problems. A default judgment does not equal cash, and enforcing it requires garnishments, judgment liens, and post-judgment discovery to find assets. A judgment against a debtor with no assets returns nothing regardless of how strong your case was.

Move-on trigger. Walk away from litigation when the estimated legal spend approaches or exceeds the invoice, or when the debtor's collectible assets are unclear. Delos AI automates this same litigation stack, including small claims and lien matters, which makes claims economical to pursue at sizes that would never justify a traditional retainer.

Side-by-Side Comparison

Each method trades speed against cost and certainty differently, so the right choice depends on how fast you need the cash in hand.

Why Selling the Claim Is the Fastest Path to Certainty

Every other method on this list asks you to keep waiting, keep spending, or keep carrying the default risk. A demand letter needs the debtor to cooperate. Factoring pays a reserve only after the debtor pays. Litigation can run 18 months and still end below your legal bill. Selling the claim to Delos AI ends all three uncertainties on day one. You take roughly 80% of face value and walk away with cash and no further exposure.

That price exists because Delos automates the full litigation stack, including small claims and lien matters that cost more to pursue than they return under traditional hourly billing. Delos can profitably chase claims you cannot, so it buys them outright. Speed, certainty, and zero ongoing risk only line up in one place, and that is a clean sale.

Frequently Asked Questions

What if my invoice is under $10,000? Small claims court caps business claims well below that in many states, with Washington limiting businesses to $5,000. Delos AI buys small claims and lien-related matters that collection agencies and litigators usually decline as uneconomic. You can sell a sub-$10,000 claim and collect roughly 80% of face value immediately instead of writing it off.

What documentation do I need to sell a claim or pursue recovery? You need the underlying contract or purchase order, the invoice itself, any acknowledgments or partial payments, and communications showing you performed. Delos reviews the same records that support a litigation file, so a clean paper trail speeds the offer. Strong documentation raises your recovery price and shortens the time to a decision.

Does selling a claim to Delos affect the business relationship with the debtor? Selling the claim transfers your legal right to recover, so Delos handles all further contact with the debtor. You step out of the awkward position of chasing a customer you may still want to work with. Delos can start with amicable outreach and escalate to full litigation automation only if the debtor stalls, which keeps early contact civil.

How long before a past-due invoice becomes unrecoverable? Recovery odds fall sharply as an invoice ages, and statute-of-limitations clocks eventually extinguish the claim entirely, running four years for a written contract in California. Waiting past 90 days pushes many invoices into write-off territory. Selling the claim early locks in cash before that decline accelerates.

Can I use more than one method at the same time? You can send an attorney demand letter and then escalate to a collections agency or litigation if it fails, since each step builds on the last. You cannot factor and sell the same invoice at once, because both transfer rights in the receivable. Selling the claim to Delos ends the sequence, since it converts the invoice to cash and moves the entire recovery effort off your desk.