--- title: CBP Audit Response Services | CF-28, CF-29 & Detentions description: Get rapid CBP audit response in China & Vietnam. Evidence gathering, supplier affidavits, valuation & origin review, UFLPA compliance, penalty defense. image: https://asia-agent.com/hubfs/vietnam-factory-inspection-metal-finishing-asia-agent.jpg --- [Skip to content](https://asia-agent.com/cbp-audit-response#main-content) [![AsiaAgent Logo Design b](https://asia-agent.com/hs-fs/hubfs/AsiaAgent%20Logo%20Design%20b.png?width=120&height=80&name=AsiaAgent%20Logo%20Design%20b.png "AsiaAgent Logo Design b")](https://asia-agent.com/?hsLang=en) - [Home](https://asia-agent.com) - [About Us](https://asia-agent.com/about-us) - [Project-Based Services](https://asia-agent.com/project-based-services) - [Contact Us](https://asia-agent.com/contact-us) - [Blog](https://asia-agent.com/blog) # CBP Audit ResponseDefend Against CF-28, CF-29 & Shipment Detentions ##  On-the-ground audit defense in China & Vietnam. Supplier affidavits, UFLPA rebuttal, valuation and classification proof — delivered before CBP deadlines.  ![vietnam-factory-inspection-metal-finishing-asia-agent](https://asia-agent.com/hubfs/vietnam-factory-inspection-metal-finishing-asia-agent.jpg) When CBP Knocks, You Need Proof — Fast ## **Immediate** CBP Audit & Detention **Support** — CF-28, CF-29 & UFLPA Cases If you have received a **CBP Form 28 (Request for Information), Form 29 (Notice of Action), detention notice, or audit letter**, the clock is already running. Deadlines are short. Penalties escalate quickly. Incomplete responses trigger deeper investigations. Our teams in **China and Vietnam gather factory records, supplier affidavits, and legal documentation immediately** — so your response is built on evidence, not guesswork. [Get Immediate CBP Help](https://asia-agent.com/book-a-meeting?hsLang=en) [Request Case Review](https://asia-agent.com/contact-us?hsLang=en) ## Asia Agent: On-the-Ground CBP Audit Response in China & Vietnam ###### **On-the-Ground CBP Audit Response** When CBP sends a **CF-28, CF-29, detention notice, or audit letter**, your ability to respond depends on the documentation behind your supply chain. Most importers rely on brokers to gather documents. We go directly to the **factory floor**. Our teams in China and Vietnam collect supplier records, verify production details, draft affidavits, reconcile invoices, and assemble a complete audit response file ready for submission to CBP. --- ### Why This Matters ###### CBP enforcement is increasing across: • valuation • classification • country of origin • forced labor (UFLPA) • AD/CVD scope risks Importers remain **legally responsible for errors**, even when suppliers cause them. A strong, documented response demonstrates **reasonable care**, reduces penalties, prevents shipment seizure, and limits long-term scrutiny. --- ### What’s Included ## 1. Rapid Evidence Gathering On-site factory verification within **1–3 business days** Immediate collection of production, shipping, and payment records Secure evidence transfer with **time stamps and version control** --- ## 2. Supplier Affidavits & Legal Documentation Affidavits confirming **origin, valuation, and classification** Retroactive supplier contracts or upgrades with penalty clauses Legal narrative prepared with counsel in **China and Vietnam** --- ## 3. Classification & Valuation Review HTS classification review for each SKU Cross-check against CBP rulings and precedent decisions Valuation worksheets covering assists, molds, royalties, commissions Invoice-to-bank-wire reconciliation to support declared values --- ## 4. Country of Origin & AD/CVD Verification Substantial transformation analysis AD/CVD scope screening against DOC orders On-site confirmation of production location Country-of-Origin Determination Memo for CBP review --- ## 5. Pre-Entry Internal Audit Cross-review of invoice, packing list, BL, ISF, and entry summary Identification of discrepancies before CBP does Coordination with brokers to align filings with evidence --- ## 6. Supplier Non-Cooperation Handling Direct negotiation with suppliers Documentation of refusals to demonstrate importer good faith Fallback options including third-party audits or supplier replacement --- ## 7. Penalty Mitigation & Post-Case Support Evidence file structured to demonstrate **reasonable care** Support for penalty mitigation submissions Post-case compliance improvements to prevent recurrence --- ### Typical Response Timeline ###### **Day 0 — Engagement & case review** ###### **Days 1–3 — On-site factory visit and evidence collection** ###### **Days 2–5 — Affidavits, reconciliation worksheets, and legal memos drafted** ###### **Before CBP deadline — Complete response file delivered to broker or counsel** --- ### Investment ###### Typical case range: **$9,000 – $26,000** ###### Pricing depends on: ###### • urgency of CBP deadlines • number of suppliers involved • SKU complexity ###### Each case is scoped individually. --- ### Why Asia Agent ###### Factory access — our teams operate directly inside supply chains in China and Vietnam ###### Speed — on-site factory verification within days ###### Legal support — contracts and memos prepared with licensed lawyers ###### Supplier leverage — we negotiate, escalate, and document refusals ###### Full coverage — classification, valuation, origin, UFLPA, and AD/CVD risks handled in one response file ###### Penalty defense — documentation built to demonstrate reasonable care --- ## Next Step **Received a CF-28, CF-29, or Detention Notice?** Contact us immediately. We will review your case, coordinate with your suppliers, and assemble the documentation needed to meet CBP’s deadline. ##### [Get Immediate CBP Help](https://asia-agent.com/contact-us?hsLang=en) FAQs ## CBP Audit Response – FAQ You have questions—and in an active audit, time is everything. When CBP issues a CF-28, CF-29, or detains your shipment, even compliant businesses can get caught short if they don’t respond fast with solid proof. These FAQs explain how our CBP Audit Response service works, how we mobilize boots on the ground, and how we build the evidence and affidavits you need to protect your shipments and close cases quickly. ##### [QUESTION What is CBP Audit Response?](https://asia-agent.com/cbp-audit-response#collapse1-dnd_area-module-6) It’s our **emergency service** when CBP has already issued a CF-28/CF-29 or detained your shipment. We gather evidence, secure affidavits, and build a defense file within the short deadlines CBP sets. ##### [QUESTION How is this different from CBP Audit Readiness?](https://asia-agent.com/cbp-audit-response#collapse2-dnd_area-module-6) **Readiness = insurance** before an audit, with contracts and reports in place. **Response = rapid action** during an audit, detention, or penalty inquiry. Most clients need both, but Response is for urgent cases. ##### [QUESTION How fast can you act?](https://asia-agent.com/cbp-audit-response#collapse3-dnd_area-module-6) We mobilize in **24–72 hours** in China or Vietnam. Our local teams visit factories, collect documents, and start drafting affidavits immediately. ##### [QUESTION What documents do you provide?](https://asia-agent.com/cbp-audit-response#collapse4-dnd_area-module-6) A complete **Audit Response File** including: - Supplier affidavits & origin/value declarations - BOMs and HS code mapping - Invoices tied to payment proof - Photos/videos from factory visits - Legal narrative to demonstrate “reasonable care” ##### [QUESTION What if my supplier refuses to cooperate?](https://asia-agent.com/cbp-audit-response#collapse5-dnd_area-module-6) We escalate using legal tools—contracts, penalty clauses, affidavits drafted under local law. If they still resist, we document their refusal so CBP sees you acted in good faith. ##### [QUESTIONS Can you talk directly to CBP for me?](https://asia-agent.com/cbp-audit-response#collapse6-dnd_area-module-6) No one but your broker or counsel can formally respond. We work behind the scenes—preparing the evidence, affidavits, and legal narrative your broker files on your behalf. ##### [QUESTIONS Can you handle UFLPA detentions?](https://asia-agent.com/cbp-audit-response#collapse7-dnd_area-module-6) Yes. We conduct forced-labor screenings, gather upstream supplier docs, and prepare traceability files to address UFLPA-related holds. ##### [QUESTIONS What if I’ve never worked with Asia Agent before?](https://asia-agent.com/cbp-audit-response#collapse8-dnd_area-module-6) We can still step in. Even without prior setup, we audit your supplier on-site, build affidavits, and prepare a defense file from scratch. ##### [QUESTIONS What if my shipment is already sitting at port?](https://asia-agent.com/cbp-audit-response#collapse9-dnd_area-module-6) We fast-track factory visits, prepare the evidence, and coordinate with your broker to respond within CBP’s deadline. Every day matters—detention fees build fast. ##### [QUESTIONS What if CBP issues penalties or demands back duties?](https://asia-agent.com/cbp-audit-response#collapse10-dnd_area-module-6) We help you prepare supporting documents to contest or mitigate them. We also provide a legal trail showing you exercised “reasonable care.” ##### [QUESTIONS Do you work with my customs broker?](https://asia-agent.com/cbp-audit-response#collapse11-dnd_area-module-6) Yes. We prepare the full evidence packet and coordinate with your broker to file it on time. ##### [QUESTIONS Can you handle multiple suppliers at once?](https://asia-agent.com/cbp-audit-response#collapse12-dnd_area-module-6) Yes. We assign separate teams if needed. Each supplier gets its own evidence set and affidavits. ##### [QUESTIONS What happens if I miss CBP’s deadline?](https://asia-agent.com/cbp-audit-response#collapse13-dnd_area-module-6) CBP can issue default penalties, duty bills, or even seize goods. Our service is designed to prevent that by meeting deadlines with complete files. ##### [QUESTIONS Can this guarantee CBP will release my goods?](https://asia-agent.com/cbp-audit-response#collapse14-dnd_area-module-6) No one can guarantee CBP’s decision. But presenting a **complete, verified, and well-organized file** gives you the strongest possible chance. ##### [QUESTIONS Do you upgrade contracts as part of this service?](https://asia-agent.com/cbp-audit-response#collapse15-dnd_area-module-6) Yes. Where possible, we backfill weak POs with **retroactive contracts and affidavits** signed under local law, proving you demanded compliance even before the audit. ##### [QUESTIONS How do I start if I just got a CF-28/CF-29?](https://asia-agent.com/cbp-audit-response#collapse16-dnd_area-module-6) Send us the notice and entry details. We immediately review it, deploy a team to your supplier, and start building your response file. ##### [QUESTIONS Do you only cover China?](https://asia-agent.com/cbp-audit-response#collapse17-dnd_area-module-6) We focus on **China and Vietnam**, where most of today’s audits and detentions occur. Both hubs are fully covered with local teams and legal support. ##### [QUESTIONS What’s the ultimate benefit of CBP Audit Response?](https://asia-agent.com/cbp-audit-response#collapse18-dnd_area-module-6) Without a strong response, an audit can escalate into **hefty retroactive duty bills, steep penalties, or even a criminal case** if CBP believes there was negligence or fraud. The ultimate benefit is that we give you the **highest possible chance to avoid or reduce those outcomes**. By delivering supplier affidavits, contracts, and a complete defense file on time, we show CBP you acted in good faith and exercised “reasonable care”—your strongest legal shield against fines or prosecution. ## Explore Related Compliance Services - **General Audit Preparedness** Build a compliance file before CBP knocks. We prepare U.S. importers for Focused Assessments, valuation reviews, and customs risk management. ➡️ *Link: /[general-audit-preparedness](https://asia-agent.com/general-audit-preparedness-cbp-compliance?hsLang=en)*   - **Supply Chain & Due Diligence** Map suppliers, verify factories, and prove raw material origins. On-site audits in China and Vietnam deliver the transparency importers need under U.S. law. ➡️ *Link: /[supply-chain-due-diligence-supplier-verification-china-vietnam](https://asia-agent.com/supply-chain-due-diligence-supplier-verification-china-vietnam?hsLang=en)*   - **UFLPA-Specific Compliance** CBP is detaining shipments under the Uyghur Forced Labor Prevention Act. We provide the affidavits, proof of no forced labor, and rebuttable presumption evidence you need. ➡️ *Link: /[UFLPA Compliance Services](https://asia-agent.com/uflpa-compliance-forced-labor-supply-chain-china?hsLang=en)*   - **Factory Verification Report Services** On-site supplier audits in China & Vietnam with geo-tagged photos, chain-of-custody documentation, and compliance reports that withstand CBP scrutiny. ➡️ *Link:* `/factory-verification-report-supplier-audits-china-vietna` our commitment to excellence ## Experiences That Inspire Discover the experiences and testimonials of our clients as they share their thoughts on collaborating with us, highlighting the exceptional service they received and the impressive outcomes they have accomplished.   [Start Now](https://asia-agent.com/book-a-meeting?hsLang=en) "From negotiating better contracts to providing legal and quality control support, Asia Agent has saved us time and money" ![Olivia Martinez](https://asia-agent.com/hubfs/Olivia%20Martinez.png) SmartTech26 Gadgets ##### David Cohen "The hands-on approach of Asia Agent’s team was impressive. 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