Accounts payable specialist screening questions: volume, matching, vendor fraud and 1099s

Accounts payable specialist screening questions should find out how many invoices the candidate personally processed, what they did when an invoice did not match the purchase order or receipt, how they handled a vendor asking to change bank details, and what their part was in payment runs and 1099s. Specialists who did the work answer with weekly counts, exception types, system screens and a fraud attempt they stopped. Inflated resumes say "full-cycle AP" and mean they keyed invoices someone else coded and approved.

This bank is for AP clerks, specialists and leads. It is narrower than staff accountant phone screen questions, which treats AP as one background among several, and it skips payroll, which has its own payroll specialist bank. The focus here is what only AP owns: matching, the vendor master, payment controls and year-end information returns.

Which AP seat: clerk, specialist, lead or shared services

Settle which seat the client needs at intake. A shared services candidate who cleared 400 exceptions a week can struggle in a two-person team that also owns vendor setup and 1099s, and a small-company generalist can drown in a queue with hourly targets.

Volume and pace: numbers that hold up

AP volume is easy to overstate because candidates quote the department's numbers. Ask for their own, in one unit, and then ask what share needed a human.

Three-way match and the exceptions that matter

A three-way match compares the invoice with the purchase order and the receiving record: right item, right quantity received, right price. Most invoices that match pass without much work. The job is the ones that do not, so spend the time there.

The duplicate question is a good depth test. Anyone who has worked in AP for a year has seen "INV-10452" and "10452" entered as two invoices, or a vendor set up twice with slightly different names. People who describe the pattern have looked for it.

Vendor master, bank changes and payment fraud

The most expensive AP mistake is paying a fraudster who has impersonated a real vendor. The FBI's Internet Crime Complaint Center reported more than $55 billion in exposed losses to business email compromise worldwide between October 2013 and December 2023, and recommends using secondary channels to verify requests to change account information, in its September 2024 public service announcement. Read the scenario and let the candidate talk.

Read aloud:
"You get an email from a long-standing supplier's accounts receivable
contact. It says they have moved banks and attaches a letter on their
letterhead with new ACH details. They ask you to update them before
Thursday's payment run, because a $48,000 invoice is due. The email
address looks right. What do you do?"

Follow-ups on the vendor master

• "Who could add a vendor or change bank details at your last company?" Strong: a named role outside AP processing, or a separate approval step. Red flag: anyone on the AP team could do both.
• "What did you collect before setting up a new vendor?" Strong: a W-9 or the foreign equivalent, bank details verified independently, an approved request from purchasing. Red flag: whatever the requester emailed over.
• "Have you ever stopped a fraudulent payment, or seen one get through?" Strong: a specific attempt, how it was spotted and what changed afterwards. Red flag: "That never happens to us."
• "Did your bank use positive pay, and what did you do with exceptions?" Strong: knows the check or ACH file went to the bank and who decided on exception items. Red flag: never heard of it, for a role that issues checks.

Payment runs, 1099s and W-9s

The federal rules on vendor information returns changed recently, which makes a useful check on whether a senior candidate keeps up. For payments made after December 31, 2025, Form 1099-NEC is filed for each person paid at least $2,000 in nonemployee compensation during the year, up from the $600 threshold, and the forms are due to the IRS and the payee by January 31, per the IRS instructions for Forms 1099-MISC and 1099-NEC (December 2026 revision, as of September 2026). The same instructions say payments to corporations are generally exempt, but not payments for legal services. When a payee does not provide a correct TIN, the payer may have to withhold at 24 percent, per the IRS backup withholding page. You do not need to quiz candidates on the rules; ask about their part.

Month-end, vendor statements and accruals

• "What was AP's part in the month-end close?" Strong: invoice cutoff, a received-not-invoiced accrual list, prepaid flags, the AP subledger tied to the GL. Red flag: "Close was accounting's job."
• "How often did you reconcile vendor statements, and what did you find?" Strong: key vendors monthly, others quarterly; missing invoices, unapplied credits, a payment the vendor applied to the wrong invoice. Red flag: never looked at a vendor statement.
• "Tell me about a credit memo that sat unused." Strong: found it on a statement or aging report, applied it or requested a refund. Red flag: did not know credits needed to be applied.
• "Did you handle employee expenses or purchasing cards?" Strong: the tool (SAP Concur, Expensify, Navan or similar), audit rules, missing-receipt policy and card reconciliation. Red flag: approved their own manager's expenses without checking policy.

Systems: ERP, AP automation and Excel

If the client uses a system the candidate has not touched, write that in the submittal. AP skills move between ERPs easily; a candidate caught stretching one is harder to place than one who said "I have not used NetSuite."

Credentials, logistics and lawful limits

Most AP roles do not require a credential. The one recruiters meet most is IOFM's Accredited Payables Specialist (APS). As of September 2026, IOFM's APS page recommends one to three years of related experience depending on education, describes a final exam of 100 multiple-choice questions in 90 minutes, and requires 15 continuing education units a year to maintain it. IOFM will confirm whether a person is certified, and until when, through its verification form. Treat it as supporting evidence, not a substitute for the fraud scenario.

Then confirm the logistics: on-site days (many AP teams still handle checks and mail in the office), month-end and 1099 season overtime, pay expectation (see salary expectation questions), notice period, and the same two work authorization questions for every candidate.

Knockout checklist and scorecard

Knock out, or flag to the client before submitting, if:

• The candidate would update bank details from an email without independent verification, even after a prompt.
• They changed PO prices, approved non-PO invoices or released payments alone and see no problem with it.
• They cannot describe a single exception, duplicate or vendor reconciliation from their own work.
• Volume or setup is far from the client's (a shared services queue for a small team that also owns vendor setup) and neither side has agreed it is a stretch.

Write the evidence next to each score in the candidate's words: "Would call the supplier on the number in our vendor file, not the email; second approver on every bank change." That line is what a controller looks for first. Interview Signal attaches quotes like that to each score from the call itself, so you are not reconstructing the fraud answer from memory. For the conversation after the screen, the reference check template works well with a former AP manager or controller.