Core Issue: Definition of Main Model vs. Additional Model in Reports

In test reports (e.g., CE, FCC, CPC document types), the Main Model (Primary Model) refers to the sample that was physically submitted and fully tested. The Additional Model (Series Model) refers to models that, after a difference analysis of structure, key components, circuit design, etc., are judged by the testing body to be able to use the same test data and be covered under the same report.

Product examples: Common in household appliances, electronic toys, luminaires, IT/AV equipment, batteries, etc. For instance, different sizes or colors within the same series may be listed as additional models if the internal circuits and key materials are consistent. Note that whether additional model coverage is permitted depends on the testing body’s assessment under applicable standards and the platform’s specific requirements for model declarations.

Applicable Scenarios: Platform Reviews Where Model Distinction Matters

When uploading compliance documents on platforms such as Amazon, TEMU, or Walmart, the platform may requests that the uploaded test report or compliance document covers all listed selling models. If the platform system detects models that are not covered by the report, it may trigger review delays or additional document requests.

Common scenarios include:

  • When multiple SKUs of the same product share one report, confirm that each SKU’s model is listed in the report and clearly identified as main or additional.
  • When the platform requires a model list or declaration document (e.g., DoC, Declaration of Conformity), the model list in the report may serve as supporting evidenc.

Platform review note: This article is for document preparation reference only. Platforms retain final review authority. No guarantee of acceptance is implied.

Common Misconceptions

Misconception 1: Additional models require no technical documentation

Some assume additional models need no testing based solely on declarations. In practice, additional models require a reasonable structural difference assessment and engineering judgment. The testing body usually retains the difference analysis record. If a platform requires a full test report for each model individually (common for high-risk products), additional model coverage may not be accepted. Confirm based on platform-specific rules.

Misconception 2: Main and additional models are interchangeable

The main model in a report is the actual tested object. Additional models cannot be used as the main model unless that model is physically submitted for testing. To cover a new model, a reasonable difference analysis and possibly supplementary testing are needed.

Misconception 3: All platforms accept the same report covering additional models

Platform rules on model coverage vary. Some platforms automatically verify if model names exactly match those in the report. Mismatches may trigger review. Final acceptance depends on platform policy and the specific combination of documents submitted.

Document Preparation Tips: How to Verify the Model List in a Report

  1. After receiving a test report, first check the model list on the cover page or appendix to confirm both main and additional models are listed.
  2. Verify that model names match selling models exactly (including case, spaces, symbols).
  3. If selling models exceed those in the report, assess whether a difference analysis or additional testing is needed.
  4. Prepare a model declaration document listing all models and their relationship to the report (main/additional), signed by the manufacturer if necessary, as a supporting file for upload.
  5. Retain original test reports and difference analysis records for potential platform or regulatory review.

Pre-submission checklist: confirm correspondence between report model list and platform selling models; confirm report is valid and covers applicable regulations (note that separate reports may be needed for RoHS, REACH, etc.); retain the difference statement between main and additional models.

Risk Notice

The classification of main and additional models in a test report is based on the testing body’s assessment of product consistency. During compliance document review, platforms may impose additional model correspondence requirements (e.g., demanding independent test reports for each model). Manufacturers and sellers should evaluate based on product category, applicable regulations in the target market, and latest platform rules. This article provides technical preparation guidance only and does not guarantee review outcomes.

Related services: If you need an assessment of whether your report’s model coverage meets platform requirements, or require supplementary difference analysis or model declaration documents, our technical team can assist with verification.