What Is an eCheck? A Payer's Guide to Paying Suppliers by Electronic Check

An eCheck is most often an ACH debit that a payer authorizes online or by phone, using the same routing and account numbers printed on a paper check. Some services also use the term for a check sent by email that the supplier prints or deposits.

For a payer, the difference matters. One version lets the supplier pull money from your account. The other is still a check, just delivered faster. Before AP agrees when a supplier asks to be paid by eCheck, it's worth knowing which one is on the table and what each exposes.

Key Takeaways

• "eCheck" is a market term with no single regulatory definition. It usually means an ACH debit, though some products use it for an emailed or printable check.

• An eCheck run as an ACH debit is pulled by the supplier, while an ACH credit is pushed by the payer. That difference decides who controls the payment.

• An emailed check removes postage and mail time but still carries the fraud risks of a paper check once it's printed.

• For most AP teams, pushing an ACH credit or paying by virtual card keeps more control than letting a supplier debit the company's account.

• Checks remain the payment method most targeted by fraud, which is why moving suppliers off paper is worth the effort.

What is an eCheck and how does it work?

An eCheck is a check-like payment made electronically, and the term covers two different mechanisms. The common one is an ACH debit authorized online or by phone. The other is an emailed check that the recipient prints and deposits or deposits by image.

No payments regulator defines "eCheck." The word comes from payment processors and check-delivery services, so it helps to describe each version by what actually happens to the money.

In the ACH debit version, a payer gives the payee a routing number and account number, usually through an online form or over the phone, and authorizes a debit. The payee's bank sends an ACH debit entry, and the money moves out of the payer's account through the ACH Network. Nacha's ACH Developer Guide lists the codes these entries travel under. WEB covers debits authorized "via the internet or a wireless network," TEL covers debits authorized by phone, and CCD covers credits or debits "originated to a corporate account." There's also a check-conversion family, ARC, BOC, and POP, which turns an eligible paper check into a one-time ACH debit.

In the emailed check version, a check-delivery service creates a check image and sends it to the payee by email. The payee prints it and deposits it like any other check, or deposits the image through a mobile or remote deposit service. The money still moves through check clearing, not the ACH Network.

Is an eCheck the same as an ACH payment?

Usually, yes, but with an important twist. The common eCheck is an ACH debit, which the payee pulls from the payer's account. Most AP teams pay suppliers with ACH credits instead, which the payer pushes to the supplier's account.

Both run on the same network, but control sits on opposite sides. With an ACH credit, AP decides the amount and the date and initiates the payment. With an ACH debit, the supplier initiates it based on your authorization, and your account number sits in the supplier's systems. If you want a refresher on how both work, the guide to what an ACH payment is covers the basics.

The network itself is enormous, which is part of why eCheck products are everywhere. The Federal Reserve's Federal Reserve Payments Study counted 39.7 billion ACH payments worth $104.06 trillion in 2024. Nacha's ACH Payments Fact Sheet puts 2025 at 35.2 billion payments worth $93 trillion, including 8.1 billion B2B payments, up 9.9% from 2024. Those figures count debits and credits together, so they can't tell you how many were eChecks, only how much traffic the rails carry.

Consumer rules add one more wrinkle. Under Regulation E, when a consumer's paper check is used to start a one-time electronic transfer, the transaction "is treated as an EFT and not a payment originated by check," according to the CFPB's text of 12 CFR 1005.3. That rule covers consumer accounts only, but it shows how differently the law treats a check and an electronic debit, even when the paper looks the same.

How is an eCheck different from a paper check?

An eCheck moves money electronically, while a paper check moves a piece of paper that later becomes an electronic transaction. That changes speed, cost, and exposure.

Paper checks still matter in sheer volume, though they're shrinking. According to the same Federal Reserve study, U.S. check payments fell to 9.2 billion by number and $24.45 trillion by value in 2024, down 1.8 billion and $1.92 trillion from 2021. Every one of those checks had to be printed and mailed before anyone deposited it, and each step costs money. The guide to the true cost of paper checks walks through how those costs add up.

An eCheck run as an ACH debit skips the paper entirely. The emailed version skips the printing and postage on the payer's side but brings the paper back on the supplier's side.

What is the difference between an eCheck and ACH?

In most cases, an eCheck is one kind of ACH payment, an ACH debit the payee pulls, while "ACH" covers both debits and credits. The practical differences come down to who starts the payment, what the supplier receives, and how much of your bank information leaves your control.

ACH timing depends on when the payment is sent and how. Same Day ACH can settle payments the same business day, and Nacha's Same Day ACH limit is $1 million per payment today.

Reconciliation differs too. A pushed ACH credit starts in your AP system, so the payment and the invoice are linked from the start. A debit the supplier pulls shows up on the bank statement first, and AP has to match it back to an invoice after the fact. With an emailed check, the clearing date depends on when the supplier gets around to depositing it, which makes cash forecasting a little harder.

The column that matters most for AP is the last one. Any method that puts your account number in someone else's hands, whether on paper or in a supplier's billing system, creates a path for unauthorized debits or altered checks. A pushed ACH credit and a virtual card payment keep it in-house.

How do you pay a supplier by eCheck?

How you pay by eCheck depends on which kind the supplier means. For an ACH debit, you authorize the supplier to pull the payment from your account. For an emailed check, you use a check-delivery service to send a check image the supplier can print or deposit.

To pay by ACH debit, AP typically follows these steps:

1. The supplier sends a payment link, portal login, or authorization form.

2. AP enters the company's routing and account numbers and authorizes the amount, either once or on a recurring schedule.

3. The supplier's bank originates an ACH debit against your account.

4. AP reconciles the debit against the invoice when it shows up on the bank statement.

To pay by emailed check, the steps run differently:

1. AP creates the check in a check-delivery service, entering the supplier's details and the amount.

2. The service emails the check image to the supplier.

3. The supplier prints and deposits it, or deposits the image remotely.

4. The check clears through your bank like any other check, and AP reconciles it when it posts.

Each route sends something outside the company. The ACH debit shares your account number with the supplier's billing system. The emailed check puts your account number on a document that lives in an inbox and on a printer.

Protect cash flow with modern AP

Modernize AP to cut costs, speed approvals, and mitigate payment risk — gaining the real-time visibility to protect cash flow and scale with confidence.

Download the whitepaper

What should AP check before agreeing to an eCheck request?

A supplier's request to be paid by eCheck deserves the same review as any change to how a vendor gets paid. Before saying yes, AP should be able to answer a few questions:

• Which kind of eCheck does the supplier mean, an ACH debit or an emailed check?

• Did the request come from a known contact at the supplier, confirmed by a call to a number already on file?

• If it's a debit, can the bank restrict debits to this supplier's company ID and a set maximum amount?

• Will the payment still carry enough remittance detail for the supplier to apply it and for AP to reconcile it?

• Would the supplier take a virtual card or an ACH credit instead, which keep the company's account number in-house?

If the answers point to a debit with no filter in place, or a request that arrived only by email, slow down. Payment-method changes are a favorite opening for impersonation fraud, and an eCheck request is a payment-method change.

Why would a supplier ask to be paid by eCheck instead of card?

Suppliers usually ask for eCheck to avoid card acceptance fees and to get paid faster than a mailed check. Many also use receivables software that offers eCheck as a default option alongside card.

From the supplier's side, the request makes sense. An ACH debit costs less to accept than a card payment, arrives faster than a check in the mail, and lets the supplier control timing on recurring bills. For AP, though, the supplier's convenience shouldn't automatically set the payment method. If your company earns rebates on card spend, moving a supplier from card to eCheck also gives up that value. Corpay's single-use virtual cards give suppliers who want electronic payment another option, since each card number works for one payment only.

Should AP agree to let a supplier pull an ACH debit?

For most AP teams, no. Pushing an ACH credit or paying by card keeps control with the payer, while an ACH debit hands it to the payee. AP should agree to debits only for specific suppliers, under specific limits.

Debits make sense in a few narrow cases. Tax payments and some utilities are common examples, as is a supplier with a long track record and a predictable recurring bill. Even then, most banks offer debit blocks and filters that let you allow debits only from approved company IDs, up to set amounts. Set those up before saying yes. Without them, any party with your account number and a plausible authorization can try to debit your account.

That's not hypothetical. According to AFP's 2026 Payments Fraud and Control Survey Report, paper checks were the payment method most targeted by fraud in 2025, cited by 58% of organizations, followed by ACH debits at 30% and wire transfers at 25%. ACH debits are the second most targeted method, and accepting eCheck debits adds to that exposure. The steps in the guide to preventing ACH credit fraud apply on the outgoing side too.

Are eChecks safer than paper checks?

An eCheck run as an ACH debit is generally safer than a paper check, because there's no paper to steal, alter, or wash. An emailed check is only partly safer. It avoids the mail, but once printed it's still a check, with the same exposure as one you mailed.

Mail theft drives much of the paper-check risk. FinCEN's 2023 alert on mail theft-related check fraud reported that financial institutions filed more than 350,000 check-fraud suspicious activity reports in 2021, up 23%, and over 680,000 in 2022, nearly double. Thieves steal checks from the mail, chemically wash the ink, and rewrite the payee or amount.

Paper checks need defenses that electronic payments don't:

• Positive pay, where your bank matches each presented check against the list you issued.

• Secure check stock with features that make alteration harder.

• Separate duties for printing, signing, and mailing.

• Prompt reconciliation so altered checks are spotted fast.

An emailed check benefits from positive pay too, because it still clears as a check. That's the loose end with emailed checks. They solve the mail problem but leave your account number on a document someone else prints, which means the check-fraud controls have to stay in place.

Where eChecks fit in a supplier payment mix

eChecks fit best as a bridge for suppliers who won't take card or ACH credit. For most AP teams, the better order is virtual card where suppliers accept it, ACH credit where they don't, and checks or eChecks only when nothing else works.

The broader shift away from paper is well underway. The Federal Reserve Bank of Cleveland's September 2026 brief on B2B payments found checks fell from 32% of B2B payments by number in 2015 to 13% in 2024, while ACH rose from a quarter of payments to 41%. Nacha's report on the ACH Network in the second quarter of 2026 counted 2.2 billion B2B payments that quarter and 4.3 billion in the first half of the year, up 10.3%.

Checks still hang on, mostly because suppliers ask for them. The same AFP survey found 72% of organizations that use checks plan to keep using them for the foreseeable future, and 68% of those cite vendor requirements as a reason. The federal government has already made its own move, as the piece on the end of government paper checks explains.

Ranked by control and cost from the payer's side, the common rails look like this:

1. Virtual card, with no bank details shared and single-use numbers that can also earn rebates on spend.

2. ACH credit, which is low cost, payer-initiated, and shares nothing beyond the supplier's own details.

3. Wire, which is fast and final, which also makes errors and fraud hard to reverse. Wire transfer fees add up quickly for routine payments.

4. eCheck as ACH debit, which is supplier-initiated and puts your account number in their system, so use it with debit filters.

5. Emailed check, faster than mail but still a check once it's printed.

6. Paper check, the most targeted method and the most expensive to process.

Industries with many small or specialized suppliers, such as construction, often have the longest tail of check payments. The guide to subcontractor payment methods covers how those teams move suppliers to electronic options. Corpay pays suppliers by virtual card, ACH, or check from one approval flow, so the suppliers who still need checks don't hold up everyone else.

How Corpay handles supplier payments without paper

Corpay's fully managed AP pays each supplier by virtual card, ACH, or check from a single workflow, so AP doesn't have to choose rails supplier by supplier or hand out the company's bank details to get paid faster.

Corpay payments automation handles supplier enrollment and moves suppliers toward electronic payment, while still paying by check where a supplier truly requires one. Corpay virtual cards are single-use virtual cards, so no reusable account number leaves your company, and Corpay pays customers more than $800M in rebates each year.

Corpay connects through 100+ ERP integrations, including NetSuite, Sage Intacct, Business Central, and Acumatica, and most customers are live in weeks.

Frequently Asked Questions

How long does an eCheck take to clear?

It depends on which kind of eCheck it is. For an ACH debit, standard ACH settlement timing applies, and Same Day ACH can settle within the same business day for payments under Nacha's per-payment limit. An emailed check clears like any paper check once the supplier deposits it.

Is paying via eCheck safe?

Paying by eCheck is generally safer than mailing a paper check, but it isn't risk-free. With an ACH debit, your account number is shared with the supplier, so use bank debit filters. An emailed check can still be altered once printed, so keep positive pay in place.

Can I get an eCheck online?

Yes. Many supplier billing portals accept eCheck payments by ACH debit, and several check-delivery services let you create and email a check online. Confirm which kind the supplier accepts before you set it up.

Do eChecks cost money to send?

Usually the payer pays little or nothing for an ACH debit, since the supplier originates it. Check-delivery services typically charge a per-check or subscription fee. Your bank may also charge for ACH services or debit filters, so check your fee schedule.

Can an eCheck bounce?

Yes. ACH debits can be returned if your account lacks funds or the account details are wrong, much like a bounced check. An emailed check can be returned unpaid, too. Either one may bring returned-payment fees from the supplier or the bank.

David Luther

Product Marketing Program Manager

David Luther, MBA is a product marketing program manager with years of experience in commercial banking, finance, and technology sectors, with research and writing appearing in financial publications.

Payments Automation

Virtual Card