CBP's Electronic Refund Mandate: Post-Implementation Guide and Troubleshooting

The February 6 deadline has passed. If you haven't enrolled in ACH refunds yet—or you're having issues—here's exactly what to do next.

February 6, 2026 marked the end of an era: U.S. Customs and Border Protection (CBP) stopped issuing paper refund checks. Every customs refund—from duty drawbacks to protest settlements to erroneous payments—now flows exclusively through electronic ACH transfers.

For the importers who prepared in advance, the transition was seamless. But for thousands of others, the reality is messier: rejected refunds, enrollment errors, confused foreign subsidiaries, and stalled payments with no interest accruing.

If you're dealing with electronic refund issues—or you haven't set up ACH at all—this guide is your roadmap to fixing it.

What Actually Happened on February 6

Starting February 6, 2026, CBP implemented a strict "no paper checks" policy under an interim final rule published January 2, 2026. The change affects all refund types:

• Duty drawbacks (manufacturing, unused merchandise, rejected goods)
• Protest settlements (HTS classification challenges, valuation disputes)
• Erroneous payment corrections (overpaid duties, MPF adjustments)
• UFLPA detention releases (goods cleared after forced labor review)
• AD/CVD adjustments (anti-dumping and countervailing duty corrections)

The exceptions are vanishingly small: only hardship cases with explicit CBP approval can receive paper checks after February 6.

For everyone else, the rule is simple: No ACH enrollment = No refund.

The Three Most Common Problems Right Now

Problem 1: "I Didn't Know I Needed to Enroll"

Symptom: You have a pending refund, but CBP says they can't issue it because you're not enrolled in ACH.

What's happening: Your ACE Portal account exists (you can log in), but you never completed the "ACH Refund Authorization" section with your bank details.

The fix:

1. Log into the ACE Portal immediately
2. Navigate to the "ACH Refund Authorization" tab
3. Enter your U.S. bank account information for each EIN + Suffix combination you use
4. Click "Submit" and wait for CBP to validate your banking information (typically 2-5 business days)

Critical detail: You must enroll each importer number (EIN + Suffix) separately. If you operate under multiple suffixes (e.g., 12-3456789-01, 12-3456789-02), each needs its own ACH setup.

Problem 2: "My Foreign Parent Company Can't Get Refunds"

Symptom: Your European or Asian headquarters is the importer of record, but they can't receive ACH payments because they don't have a U.S. bank account.

What's happening: CBP only issues refunds to U.S. bank accounts denominated in USD. Foreign bank accounts—even with SWIFT codes and USD accounts—are not accepted.

The fix:

• Option A (Best): Designate a U.S. subsidiary or affiliate to receive refunds using CBP Form 4811 (Statement of Person Claiming Refund). The designated entity must have a U.S. bank account and enroll in ACH refunds via ACE Portal.

• Option B: Open a U.S. bank account in the foreign entity's name. Banks like HSBC, Citibank, and SVB offer commercial accounts for foreign corporations with U.S. operations.

• Option C (Last resort): Use your customs broker as the third-party recipient. File Form 4811 designating the broker, who then receives refunds on your behalf. Note: This requires trust and clear payment terms in your brokerage agreement.

Important: Existing Form 4811 designations remain valid, but the designated third party must also enroll in ACH via ACE Portal. If they don't, the refund defaults back to the importer's ACH account (which may not exist if you're foreign).

Problem 3: "My ACH Enrollment Was Rejected"

Symptom: You submitted your bank information, but got an error message or rejection notice from CBP.

What's happening: The most common causes are:

• Name mismatch: The company name in ACE Portal doesn't exactly match the name on your CBP Form 5106 (Importer ID Number application)
• Invalid routing number: You entered a wire transfer routing number instead of an ACH routing number (they're different!)
• Typo in account number: A single digit error will cause rejection
• Account type confusion: You selected "Checking" when you have a "Savings" account, or vice versa

The fix:

1. Verify your routing number by calling your bank and specifically asking for the ACH routing number (not wire, not check)
2. Double-check your account number against a recent bank statement
3. Confirm your company name in ACE Portal matches Form 5106 exactly—including punctuation, commas, and "Inc." vs "LLC"
4. Resubmit through the ACE Portal
5. If you continue having issues, contact the Revenue ACH Refund Support helpdesk at (317) 298-1200 x1400

Step-by-Step: Setting Up ACH Refunds If You Haven't Yet

If you're starting from scratch, here's the complete process:

Step 1: Verify You Have an ACE Portal Account

If you already have an ACE Portal account:

• Go to https://aceportal.cbp.dhs.gov
• Log in with your existing credentials
• Skip to Step 3

If you don't have an ACE Portal account yet:

• Go to https://aceportal.cbp.dhs.gov
• Click "Register for an Account"
• You'll need your Importer Number (EIN + Suffix from Form 5106)
• A two-factor authentication email will be sent to the point of contact listed on your Form 5106
• Complete the registration process (allow 24-48 hours for approval)

Critical: If the email address on your Form 5106 is outdated or belongs to a former employee, you'll need to update Form 5106 first. File an amended 5106 through the ACE Portal or via your customs broker.

Step 2: Gather Your Banking Information

You'll need:

• Bank name
• Bank routing number (ACH, not wire) – Call your bank if unsure
• Account number
• Account type (Checking or Savings)
• Bank address

For companies with multiple importer numbers: Prepare this information for each EIN + Suffix combination. You can use the same bank account for multiple importer numbers, but you must enter the details separately for each.

Step 3: Enter ACH Information in ACE Portal

1. Log into ACE Portal
2. Click on "ACH Refund Authorization" in the left navigation menu
3. Select the Importer Number (EIN + Suffix) you want to set up
4. Click "Add New Bank Account"
5. Enter all banking information carefully
6. Review for accuracy—typos here will cause rejection
7. Click "Submit"

What happens next: CBP validates your banking information with the U.S. Treasury Department's Bureau of the Fiscal Service. This typically takes 2-5 business days. You'll receive an email confirmation when your enrollment is approved.

Step 4: Verify Enrollment Status

After submitting:

1. Return to ACE Portal → "ACH Refund Authorization"
2. Check the status:
   • Pending: CBP is validating your information
   • Active: You're enrolled and ready to receive refunds
   • Rejected: There's an error—see Problem 3 above

Step 5: Set Up Additional Importer Numbers (If Applicable)

If you operate under multiple EIN + Suffix combinations:

1. Repeat Steps 3-4 for each additional importer number
2. You can use the same bank account, but must enter it separately for each number

Pro tip: If you have 10+ importer numbers, consider consolidating them. Many companies operate under unnecessary suffixes that can be retired.

Third-Party Refund Recipients: What You Need to Know

If someone else receives refunds on your behalf—a parent company, subsidiary, or customs broker—both parties must take action.

For Importers Using Form 4811 Designations

What is Form 4811? CBP Form 4811 (Statement of Person Claiming Refund) allows you to designate a third party to receive refunds instead of the importer of record. Common scenarios:

• U.S. subsidiary receives refunds on behalf of foreign parent
• Parent company receives refunds on behalf of operating subsidiaries
• Customs broker receives refunds for payment processing

What changed on February 6:

• Existing Form 4811 designations remain valid (you don't need to refile)
• BUT: The designated third party must now be enrolled in ACH refunds via ACE Portal
• If the third party is NOT enrolled, the refund defaults to the importer's ACH account

Action required:

1. Confirm your designated third party has enrolled in ACH refunds
2. If they haven't, either:
   • Ask them to enroll immediately (see Steps 1-4 above)
   • OR file a new Form 4811 designating a different party who IS enrolled
   • OR enroll yourself so refunds can default to your account

How to verify: Ask your designated party to log into ACE Portal and confirm they see "Active" status under ACH Refund Authorization.

For Third Parties Receiving Refunds

If you're designated to receive refunds on behalf of others (common for customs brokers and corporate parents), you must:

1. Enroll in ACH refunds for your own EIN + Suffix
2. Ensure the importer has filed Form 4811 designating you
3. Communicate your enrollment status to your clients/subsidiaries

Important for brokers: If you receive refunds on behalf of multiple clients, you only need to enroll once using your brokerage EIN. All client refunds will flow to the same account, and you're responsible for disbursing funds to the correct client.

What Happens If You Don't Enroll?

Short answer: Your refund sits in limbo, and you don't earn interest.

Long answer: When CBP processes a refund for an importer who hasn't enrolled in ACH:

1. The refund is approved and authorized
2. CBP attempts to issue the ACH payment
3. The payment fails because no bank account is on file
4. The refund enters a "manual recovery process"
5. CBP contacts you (via the email on Form 5106) requesting ACH enrollment
6. No refund is issued until you enroll
7. No interest accrues during the delay

This last point is critical. Under the old paper check system, CBP paid interest on delayed refunds if they missed statutory deadlines. But under the new rule, if the delay is caused by your failure to enroll, CBP pays no interest.

For a $100,000 protest refund delayed by 90 days, that's approximately $2,500 in lost interest (at current federal rates).

Special Situations and Edge Cases

Q: What if I'm a new importer who just got my importer number?

A: You'll need to:

1. Wait for your Form 5106 approval (typically 7-10 business days)
2. Use the contact email from Form 5106 to register for ACE Portal access
3. Complete ACH enrollment before you have any refunds due

Best practice: Set up ACH enrollment immediately after receiving your importer number, even if you don't expect refunds soon. It prevents delays when refunds do occur.

Q: Can I change my bank account after enrolling?

A: Yes. Log into ACE Portal → ACH Refund Authorization → Select your importer number → Click "Update Bank Account." The change typically takes effect within 2-5 business days.

Critical timing issue: If you have a pending refund and change bank accounts mid-process, the refund might fail. Coordinate with CBP (via the ACH helpdesk) if you need to update banking information while refunds are in progress.

Q: What if my bank account is closed or frozen?

A: CBP's ACH payment will bounce, triggering the manual recovery process. You'll need to:

1. Update your ACE Portal with new banking information
2. Contact the Revenue ACH Refund Support helpdesk at (317) 298-1200 x1400
3. Request reissuance of the failed refund

The refund will be reissued once your new account is validated—but again, no interest accrues during the delay.

Q: I have 50+ importer numbers across multiple divisions. Do I really need to enroll each one?

A: Technically yes—ACH enrollment is required for each EIN + Suffix combination. But this is an excellent opportunity to audit your importer numbers and consolidate where possible.

Practical approach:

1. Identify your active importer numbers (those with transactions in the past 12 months)
2. Enroll the active ones immediately
3. Work with your customs broker to retire unused suffixes
4. Consolidate where business divisions allow

Many companies operate under 20+ suffixes for historical reasons that no longer apply. Consolidation reduces administrative burden and simplifies refund tracking.

Q: Our customs broker handles all ACE filings. Why do I need to enroll separately?

A: Your broker files entries on your behalf, but you (the importer) are the party entitled to refunds. ACH enrollment is tied to importer numbers, not brokers.

Two options:

1. You enroll in ACH refunds and receive payments directly, or
2. You designate your broker as the refund recipient via Form 4811, and they enroll in ACH

Most importers choose Option 1 to maintain direct control over refunds, but Option 2 is common when brokers handle full payment processing.

How to Track Your Refunds Post-Enrollment

Once you're enrolled, refunds are faster—but you need systems to track them.

Best practices:

1. Monitor ACE Portal: Log in weekly to check refund status under "Payment History"
2. Reconcile bank deposits: ACH deposits will show as "CBP TREAS 449" or similar on your bank statement
3. Match to source documents: Cross-reference deposits against protest settlements, drawback claims, and entry corrections
4. Flag discrepancies immediately: If an expected refund doesn't arrive within 30 days of approval, contact CBP

Common timing:

• Duty drawback: 30-60 days after claim submission (if no review required)
• Protest settlements: 30-90 days after favorable ruling
• Erroneous payment corrections: 14-30 days after CBP identifies the error

Electronic refunds are typically 5-10 days faster than paper checks, but CBP's internal approval timeline hasn't changed.

Resources and Support

If you need help with ACH enrollment or troubleshooting:

Primary resource: ACE Portal and ACH Refunds FAQ

Phone support: Revenue ACH Refund Support Helpdesk

• (317) 298-1200 x1400
• Monday-Friday, 8:00 AM - 4:30 PM ET

Training materials: CBP published a comprehensive training guide and reference sheet in December 2025, available at the ACH Refund webpage.

Customs broker support: Your broker can help with Form 4811 designations and importer number consolidation, but they can't enroll in ACH on your behalf—you must do that through ACE Portal.

The Bottom Line

The February 6 transition is mandatory and permanent. Paper checks are over.

If you haven't enrolled yet:

• Do it today. Refunds won't be issued until you complete ACH enrollment.
• Expect no interest. Delays caused by non-enrollment don't accrue interest.
• Don't wait for a refund. Set up ACH now, even if you don't have pending refunds.

If you're having problems:

• Double-check your routing number (ACH, not wire)
• Verify your company name matches Form 5106 exactly
• Contact the ACH helpdesk at (317) 298-1200 x1400

And if you're a foreign importer without a U.S. bank account:

• File Form 4811 to designate a U.S. party to receive refunds
• Ensure that designated party enrolls in ACH
• Or open a U.S. bank account in your company's name

The good news: Once you're enrolled, electronic refunds are faster, more secure, and easier to track than paper checks. The transition pain is temporary—but only if you act quickly.

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How TariffLens Helps with Customs Compliance

While ACH enrollment is a one-time setup, managing customs compliance is an ongoing challenge. TariffLens helps importers:

• Classify products accurately to avoid erroneous payments in the first place
• Track duty exposure across all import activity
• Identify refund opportunities through HTS reclassification and FTA analysis
• Prepare for audits with organized classification documentation

If you're dealing with complex customs issues beyond ACH refunds, try TariffLens free or schedule a demo.

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Sources:

• Federal Register: Electronic Refunds Interim Final Rule
• CBP: ACH Refund Information
• CBP: ACE Portal and ACH Refunds FAQ
• CSMS #67270895: Electronic Refunds Interim Final Rule Effective February 6, 2026
• CH Robinson: Mandatory ACH Refunds Guidance

Disclaimer: This article is for informational purposes only and does not constitute legal or financial advice. Customs regulations change frequently. Always consult with a licensed customs broker or trade attorney for specific guidance on your import operations.