Executive Overview: The Data-Driven Enforcement Shift
The US Customs and Border Protection agency’s enforcement activity in 2025 demonstrated a measurable shift toward analytics-driven targeting and fact-intensive verification. CBP issued increasing volumes of CF-28 forms (Customs Form 28, used for fact-finding requests seeking additional information about shipments) and CF-29 forms (Customs Form 29, used for claim denials, duty assessments, and reclassifications). This enforcement pattern reflects CBP’s capacity to deploy sophisticated targeting algorithms that identify suspicious patterns in importer data, classify trade transactions, and flag discrepancies suggesting tariff avoidance or valuation manipulation.
The significance extends beyond enforcement volume. The specific patterns of CF-28 and CF-29 issuance reveal CBP’s enforcement priorities and the vulnerabilities that importers face. CF-28s typically indicate weak responses to previous inquiries, suggesting importers lack documentation or provide explanations CBP finds unconvincing. CF-29s indicate CBP unilaterally denies preferential tariff claims or reclassifies products based on its assessment of origin, value, or tariff treatment. Understanding these patterns enables importers to anticipate CBP focus areas and strengthen compliance before enforcement activity escalates.
- CBP issued record volumes of CF-28 fact-finding forms in 2025
- CF-29 denials increased for tariff classification and valuation challenges
- Enforcement reflects analytics-driven targeting of high-risk transactions
- Data patterns indicate vulnerability in origin verification and duty assessment
- Importers with weak responses to CF-28s face CF-29 reclassifications and duty assessments
CF-28 Requests: Early Warning Signal of Deeper Scrutiny
Customs Form 28 requests represent the entry point to CBP’s enforcement process. CBP issues CF-28s when standard customs procedures identify insufficient documentation or explanations supporting claimed tariff treatment. The form requests additional information about origin, valuation, manufacturing process, procurement, or other factors affecting duty assessment. The requesting CBP port has statutory authority to require written responses within 30 days, with possible extensions.
The critical issue is response quality. Importers that respond to CF-28s with vague explanations, incomplete documentation, or defensive language significantly increase risk of CF-29 escalation. CBP interprets weak CF-28 responses as evidence of importers unable or unwilling to substantiate their claims. This interpretation triggers more aggressive enforcement including CF-29 issuance, entry denial, and potential penalties. By contrast, importers providing thorough, documented, specific responses to CF-28s often avoid further escalation.
The specific information CBP requests reveals enforcement priorities. 2025 CF-28 activity concentrated on origin verification inconsistencies, valuation discrepancies, and preferential tariff claim documentation. This pattern suggests CBP suspects systematic tariff avoidance through misrepresentation of origin or tariff classification. Importers should anticipate that CBP will scrutinize origin documentation, bills of lading, manufacturing specifications, and supplier certifications with increasing rigor.
- CF-28 requests indicate insufficient documentation supporting tariff claims
- 30-day response requirement triggers detailed fact-finding investigation
- Response quality critically affects probability of CF-29 escalation
- Weak responses increase risk of entry denial and penalties
- CBP focuses on origin verification, valuation, and preferential tariff claims
CF-29 Escalation: Unilateral CBP Action and Duty Assessment
Customs Form 29 represents CBP assertion of authority to deny or modify import claims without importer agreement. CF-29s typically follow inadequate CF-28 responses or circumstances where CBP determines that facts on record clearly contradict the importer’s claimed tariff treatment. A CF-29 might deny USMCA preferential duty claims, reclassify products to higher tariff categories, or assess duties based on CBP’s valuation assessment.
The issuance of CF-29s signals fundamental disagreement between CBP and the importer about how an entry should be classified or valued. Unlike CF-28s which request information, CF-29s impose CBP’s determination. Importers can dispute CF-29 determinations through protest procedures, but the burden of proof shifts. Importers must prove CBP’s assessment incorrect rather than CBP proving its assertion correct. This procedural disadvantage makes CF-29 protection particularly valuable and CF-29 avoidance critical to compliance strategy.
Recent patterns indicate CF-29s increasingly address origin determination and USMCA preferential claim denial. CBP reclassifies products as non-qualifying for USMCA treatment due to origin documentation gaps, insufficient bills of lading information, or supplier certification concerns. These reclassifications immediately increase duty liability by 5-15 percentage points depending on product category, creating significant financial exposure.
- CF-29 represents CBP unilateral assertion of tariff treatment
- Frequently denies USMCA preferential claims or reclassifies products
- Protest procedures place burden of proof on importer
- Recent increases focus on origin verification and USMCA eligibility
- Duty assessments typically increase 5-15 percentage points upon reclassification
Analytics-Driven Targeting: Pattern Recognition and Enforcement Priority
CBP’s enforcement activity reflects deployment of sophisticated data analytics platforms that identify patterns in importer behavior and shipment characteristics. These analytics platforms flag inconsistencies between declared and actual product specifications, identify origin misrepresentation patterns, detect valuation anomalies, and highlight importers with statistical outliers in tariff treatment. The platforms work across thousands of entries per day, automatically escalating high-probability violations for human review.
The targeting algorithms identify specific vulnerability patterns. An importer might declare identical products from identical suppliers at substantially different declared values in different entries, triggering valuation inconsistency flags. Or an importer might claim USMCA origin for specific products despite supplier locations inconsistent with USMCA standards. These pattern-based flags generate CF-28 requests at higher probability than random targeting.
The intelligence available to CBP’s analytics platforms includes previous entry history, penalty history, country of origin patterns, supplier reputation, and product classification consistency. Importers with histories of CBP disputes or penalty assessments receive enhanced scrutiny through automated review processes. These algorithmic targeting practices significantly affect enforcement probability for specific importers regardless of individual entry characteristics.
- CBP deploys sophisticated analytics platforms for pattern-based targeting
- Algorithms identify origin misrepresentation, valuation anomalies, and classification inconsistencies
- Targeting incorporates importer history, supplier reputation, and prior disputes
- Pattern-based flags generate CF-28s at higher probability than random targeting
- Algorithmic enforcement operates continuously across all entry processing
Documentation Requirements and Preferential Tariff Claim Substantiation
The increasing frequency of origin-focused CF-28s and USMCA-denying CF-29s reflects CBP’s emphasis on substantiation of preferential tariff claims. CBP no longer accepts certificate of origin as sufficient proof of USMCA eligibility. Instead, CBP requires detailed supply chain documentation including bills of lading, manufacturing specifications, bill of materials, supplier certifications, and proof of compliance with USMCA rules of origin.
Specific documentation becomes increasingly critical. Bills of lading must identify all parties in the supply chain and accurately reflect product specifications. Bills of materials must demonstrate that components qualify under USMCA rules of origin, including domestic value content percentages and tariff shift calculations. Supplier certifications must confirm origin of components and compliance with labor and environmental standards. Missing documentation or documentation inconsistencies trigger CF-28 requests or CF-29 denials.
The practical implication is that importers must implement documentation systems capable of capturing and retaining detailed supply chain information. Companies without systematic documentation practices face increasing enforcement exposure. Conversely, importers with rigorous documentation systems and detailed supplier data can respond quickly to CF-28 requests with precise information demonstrating compliance, reducing enforcement escalation risk.
- USMCA preferential claims require detailed supply chain documentation
- Bills of lading, manufacturing specs, and supplier certifications essential
- Missing documentation triggers CF-28s and CF-29 denials
- Documentation systems must capture and retain detailed supplier data
- Rapid documentation response to CF-28s reduces escalation risk
2026 Enforcement Preparation: Strengthening Compliance Posture
The CF-28 and CF-29 patterns from 2025 signal the enforcement environment importers will face in 2026. CBP’s analytics-driven approach will intensify as platforms become more sophisticated. Importers should anticipate increased enforcement activity focused on origin verification, valuation consistency, and preferential tariff substantiation. Preparation requires systematic strengthening across multiple compliance dimensions.
Importers should immediately undertake comprehensive tariff and origin compliance audits examining all entries from the past 36 months. This historical review identifies potential vulnerabilities before CBP enforcement reaches those entries. Issues discovered through internal audit can be addressed proactively through voluntary disclosures, prior adjustment agreements, or other administrative remedies that reduce penalties relative to enforcement-initiated reviews.
Bond sufficiency becomes increasingly important in an enforcement-intensive environment. CBP can liquidate entries and assess duties without waiting for completed protests if adequate bonds are posted. Importers should review bond levels considering increased enforcement probability and higher potential duty assessments. Inadequate bonds force companies to post additional securities, creating working capital strain at precisely the moment when cash flow pressure is highest.
- Implement comprehensive tariff and origin compliance audits of past 36 months
- Address identified vulnerabilities through voluntary disclosures or administrative remedies
- Strengthen documentation systems and supplier verification processes
- Increase staff training on tariff classification and origin verification
- Review bond levels considering enforcement probability and potential assessments
- Establish rapid response procedures for CF-28 requests and documentation requests
Strategic Imperatives for Sustained Compliance
The enforcement environment demands systematic, documented compliance processes rather than transaction-by-transaction judgment. Companies must establish written tariff policies, documented classification procedures, supplier qualification requirements, and origin verification protocols. These documented systems demonstrate good-faith compliance effort and provide defensible positions if enforcement activity occurs despite systematic controls.
Training becomes essential. Importers, brokers, and internal compliance personnel must understand tariff classification principles, USMCA origin rules, valuation methodologies, and documentation requirements. Regular training ensures that personnel executing import transactions understand compliance requirements and apply consistent procedures. CBP reviewers interpreting compliance records expect documented training programs and employee familiarity with applicable regulations.
The broader lesson from 2025’s CF-28 and CF-29 activity is that tariff compliance can no longer be reactive or informal. Analytics-driven enforcement identifies pattern inconsistencies and documentation gaps with high precision. Importers who maintain systematic documentation, implement consistent processes, and substantiate claims with detailed evidence survive scrutiny successfully. Importers lacking systematic compliance infrastructure face increased enforcement exposure and higher penalty risk.
- Establish written tariff policies and documented classification procedures
- Implement supplier qualification and origin verification requirements
- Provide regular training on tariff classification and origin rules
- Maintain detailed documentation for all preferential tariff claims
- Monitor competitor enforcement activity to anticipate enforcement priorities