What to Ask Accounts Payable About a Late Invoice: 12 Questions

When an invoice goes past due, the fastest way to learn why is usually not another reminder email. It is a short conversation with the person in your customer's accounts payable team who can see the invoice in their system. A good AP call tells you in a few minutes whether the invoice is lost, stuck in approval, disputed, or simply waiting for the next payment run.

Late payment is common. In Atradius's 2026 survey of more than 600 businesses across the United States, Canada and Mexico, late payment affected seven in ten companies, and most overdue payments were settled within one month of the due date. Atradius found customer cash constraints were the leading cause, but many late invoices also stall inside the customer's own process. The AP call tells you which one you are dealing with.

This guide is for controllers and AR managers running a 3 to 5 person collections team. It gives you 12 questions to ask a customer's AP team about a late invoice, what each answer means, and what to do next.

What Should You Ask Accounts Payable About a Late Invoice?

Ask questions that follow the invoice through the customer's process in order: received, entered, matched, approved, scheduled, paid. The goal of the call is to find the exact step where the invoice stopped, then leave with a named person and a date to move it. Every question below maps to one of those steps.

Before you call

Have the invoice number, PO number, amount, invoice date, due date and the date you sent it in front of you. Check your own records first: confirm the invoice went to the right billing contact, that no payment or credit is sitting unapplied on the account, and that no one on your side already logged a dispute. Five minutes of preparation avoids the most common wasted call, which is chasing an invoice the customer already paid. If you hear an excuse rather than a status, our guide to late payment excuses and our playbook for handling delayed payments cover what to say next.

Step 1: Did the Invoice Arrive?

Question 1: "Can you see invoice [number] in your system?"

This comes first for a reason. If AP cannot find the invoice, nothing else matters. A "no" usually means it went to the wrong inbox, was sent to a person instead of the AP mailbox, or was rejected by an intake rule you never heard about.

Question 2: "Where should invoices from us be sent, and in what format?"

Many mid-market customers require invoices through a supplier portal, a single AP email address, or with specific fields such as a PO number on the face of the invoice. If you send them anywhere else, they may never be entered. Update the account the same day so the next invoice does not repeat the problem.

Step 2: Is It Entered and Matched?

Question 3: "Is it matched to a purchase order, and does it match?"

Larger customers often run a three-way match, where the invoice is checked against the purchase order and the receiving record before it can be paid, as Sage's explainer on three-way matching sets out. A mismatch on quantity, price or PO number sends the invoice to an exception queue, and exception queues are where invoices wait quietly for weeks.

Question 4: "Is anything on the invoice being questioned?"

Ask it plainly. A price difference, a missing proof of delivery or a line the buyer did not expect can hold the whole invoice. If there is an issue, get the specific line and the specific concern, then move it into your process to resolve invoice disputes rather than letting it sit as a vague "we're looking into it."

Step 3: Is It Approved?

Question 5: "Who needs to approve it, and has that happened?"

Approval is the most common stall point for invoices that arrived and matched. The approver might be a project manager, a site manager or a department head who is travelling. Ask for the approver's name and role, not only "it's with the business."

Question 6: "Is there anything I can send that would help the approver sign off?"

This question turns a wait into an action. Offer the signed delivery note, the timesheet, the work order or a copy of the PO. With multi-location customers, the approver is often at a site while payment happens at head office, so sending the proof straight to the site contact can save a week.

Step 4: Is It Scheduled?

Question 7: "When is your next payment run, and is this invoice on it?"

Many AP teams pay on set days, weekly or twice a month. If the invoice was approved the day after a run, it waits for the next one. Knowing the run calendar lets you time follow-up for the day before the run, not the day after.

Question 8: "What payment date and amount should I expect?"

Get a specific date and amount. If the customer intends to pay only part of the invoice, you want to know now, not when a short payment lands. Log the answer as a commitment in your promise-to-pay tracking so the account gets a follow-up the day after the date if the money does not arrive.

Step 5: How Will It Be Paid?

Question 9: "Will this be paid by check, ACH or card?"

Checks add mail and processing time, and they are more exposed to fraud. In the AFP's 2025 Payments Fraud and Control Survey, 63% of organizations said checks were the payment method most often subjected to fraud. If a customer still pays by check, this is a good moment to ask whether they can pay electronically, and to move the customer to ACH as part of a wider effort.

Question 10: "Do you have our current remittance and bank details on file?"

The same AFP survey found that 63% of respondents named business email compromise as the top avenue for attempted or actual payments fraud. AP teams are right to verify any change to bank details, and an unverified change can hold a payment. Confirm the details they hold match yours. If anything needs updating, follow their verification process rather than sending new details by email.

Step 6: Who Owns It From Here?

Question 11: "Who is the best person to contact about this invoice going forward?"

Get a name, a direct email and a phone number. The person who answered the main AP line may not own your account. Record the contact against the account so the next collector who works it starts in the right place.

Question 12: "If it is not paid by that date, who should I talk to next?"

Ask this politely and early. You are not threatening anything. You are agreeing on the escalation path in advance, which makes the next call easier for both sides if the date passes.

What Does Each AP Answer Mean? A Quick Reading Table

How Should a Small AR Team Run These Calls?

The questions work best when everyone on the team uses them the same way on every account.

Call before the due date on large invoices

You do not need to wait for an invoice to go past due. For your largest invoices, a short confirmation call about a week before the due date covers Questions 1, 5 and 7: received, approved, on the next run. Problems found before the due date cost days, not weeks. This fits naturally into a follow-up cadence that starts before an invoice is late.

Log every answer against the invoice

Write down the step where the invoice stopped, the named contact and the date they gave you. A note like "spoke to AP, will check" leaves the next collector with nothing. A note like "approved Nov 3, on the Nov 14 run, contact Dana in AP" lets anyone pick up the account.

Follow up the day after the date they gave

A date with no follow-up is only a hope. Put the next touch on the calendar for the day after the promised payment date, and check the bank before you call.

Know when to stop asking and escalate

If the same invoice has stalled at the same step for two follow-ups, or the customer cannot give a date at all, it is time to decide whether to escalate an invoice. Repeated vague answers often point to a cash problem rather than a process one, and that calls for a different conversation.

What Mistakes Should You Avoid on AP Status Calls?

• Asking "when will you pay?" first. It invites a vague answer. Find the step, then ask for the date.

• Accepting "it's in process." Ask which part of the process.

• Calling without the PO number. Many AP teams search by PO, not by invoice number.

• Forgetting to update the contact. The same wrong-inbox problem will hit the next invoice.

• Treating a partial payment as resolved. Short payments need their own follow-up.

Where Abivo Fits

Abivo's AI collections agent, Kate, makes the routine version of these calls and emails across every account: confirming an invoice was received, asking whether it is approved and when it will be paid, and following up the day after a promised date. Each answer is logged against the invoice, so your collectors start from what the customer said instead of from scratch, and spend their time on disputes and key accounts. You can see how Kate works on the product page.

Practical Takeaways for Controllers and AR Managers

• Follow the invoice in order: received, matched, approved, scheduled, paid.

• Prepare before you call: invoice number, PO, amount, dates, and a check for unapplied cash.

• Leave every call with a named contact and a specific date.

• Learn each key customer's payment run calendar and time follow-up to it.

• Confirm remittance details and payment method, and offer ACH to check payers.

• Log the answer against the invoice and follow up the day after the date given.

Frequently Asked Questions

What should I ask accounts payable about a late invoice?

Start by confirming they can see the invoice, then ask whether it is matched, approved and scheduled for a payment run. Leave with a specific payment date and a named contact.

When should I call AP about an invoice?

For large invoices, call about a week before the due date to confirm receipt and approval. For everything else, call shortly after the due date if no payment has arrived.

Why do invoices get stuck in accounts payable?

The most common reasons are an invoice sent to the wrong place, a mismatch with the purchase order or receiving record, a missing approval, or timing against the customer's payment run.

What if AP says the invoice is approved but it is still not paid?

Ask for the payment run date and payment method, confirm they hold your current remittance details, and follow up the day after the date they give.

How do I find the right AP contact?

Ask the person who answers for the name of whoever owns your account, then record that contact against the customer so the whole team uses it.

If you want every past-due invoice followed up each week, Get Started with Abivo.