Can warning statements be inside the manual only?

No, warning statements generally cannot be exclusively inside the manual for consumer products in the EU, US, and Canada. Critical safety warnings must typically appear on the product itself, its packaging, or be visible prior to purchase, while the manual serves as a complementary location.

European Union (EU):

• General Product Safety Regulation (GPSR): Mandates that safety warnings and information must be clearly visible and accessible to consumers before use—and for online sales, before purchase.
• Placement rules: Warnings can be on the product, packaging, or an enclosed leaflet/manual, but relying solely on an internal manual is legally insufficient if the risk is high or requires notice before handling.
• Language mandate: Warnings must be provided in the official language(s) of the specific EU member state where the product is marketed.

United States (US):

• Legal liability & standards: Under US product liability law and consensus standards like ANSI Z535.4 (for product safety signs and labels) and ANSI Z535.6 (for product manuals), warnings must be placed where the user can see them before an action or hazard is encountered.
• On-product requirement: If a hazard can cause severe injury or death and the user might be hurt before ever opening the manual, a physical warning label on the product or packaging is mandatory. The manual only supports—it does not replace—on-product labeling.

Canada:

• Regulatory alignment: Similar to the US, Canadian authorities and consumer protection laws require prominent hazard communication.
• Bilingual requirement: For specialized consumer goods (such as chemical containers under the Consumer Chemicals and Containers Regulations), warning phrases and symbols must be prominently displayed on the primary display panel in both English and French, making manual-only placement illegal