Shipping Regulations and Compliance
The FTC Mail Order Rule
The FTC's Mail, Internet, or Telephone Order Merchandise Rule (commonly called the Mail Order Rule) is the most important shipping regulation for online sellers. It requires you to ship orders within the timeframe stated on your website at the time of purchase. If your product page says "Ships within 3 business days" or your checkout page says "Estimated delivery: 5-7 business days," you must meet that commitment. If you do not state a shipping timeframe, the default deadline is 30 days from when the customer placed the order.
When you cannot ship on time, the rule requires you to notify the customer of the delay, provide a revised shipping date, and give the customer the option to cancel the order for a full refund. If the revised date is more than 30 days after the original shipping deadline, or if you cannot provide a definite revised date, the customer's silence does not constitute consent to the delay, and you must cancel the order and issue a refund unless the customer affirmatively agrees to wait. For delays of 30 days or less beyond the original deadline, the customer's silence after receiving the delay notice is treated as consent to the new date.
The practical takeaway is to set realistic shipping timeframes on your website and build in buffer. Promising "same-day shipping" when you actually ship within two to three business days violates the rule. Promising "ships within 5 business days" when you consistently ship within two gives you a safety margin without materially reducing conversion rates. During peak seasons like the holidays, update your shipping estimates to reflect actual processing times rather than maintaining optimistic estimates you cannot meet.
The FTC has fined businesses up to $50,000 per violation of the Mail Order Rule, with each late shipment potentially counting as a separate violation. Enforcement has increased against online sellers, particularly those with patterns of late shipping and failure to notify customers of delays.
Hazardous Materials Shipping (HAZMAT)
If you sell products classified as hazardous materials, you must comply with Department of Transportation (DOT) regulations and carrier-specific rules for packaging, labeling, and shipping. Hazardous materials include categories that many online sellers do not realize they are handling: lithium batteries (in products like flashlights, power banks, wireless headphones, and electronic devices), aerosol products (hairspray, spray paint, compressed air dusters), flammable liquids (nail polish, perfume, hand sanitizer, cleaning products containing alcohol), corrosive materials (certain cleaning products, pool chemicals), oxidizers (some hair dyes, hydrogen peroxide products), and compressed gases (CO2 cartridges, propane canisters).
The DOT classifies hazardous materials into nine classes, each with specific packaging, labeling, and documentation requirements. For small ecommerce sellers, the most commonly encountered categories are Class 3 (flammable liquids), Class 8 (corrosive materials), Class 9 (miscellaneous dangerous goods, which includes lithium batteries), and ORM-D (Other Regulated Materials-Domestic, a lesser category that includes many consumer products shipped in limited quantities).
USPS, UPS, and FedEx each have their own hazardous materials policies that layer on top of DOT regulations. USPS prohibits many categories of hazardous materials entirely for domestic shipments and nearly all categories for international shipments. UPS and FedEx accept a wider range of hazardous materials but require special labeling, declaration forms, and in some cases, hazmat certification training for the shipper. Shipping hazardous materials without proper documentation and labeling is a federal offense carrying fines of up to $500,000 and criminal penalties.
For products containing lithium batteries, which are among the most commonly shipped hazardous items in ecommerce, the rules depend on whether the battery is installed in the device (less restrictive), packed with the device (moderate restrictions), or shipped alone (most restrictive). Small lithium batteries meeting specific watt-hour limits can ship under an exception that reduces the packaging and labeling requirements, but you must still include a lithium battery handling label on the outer package. Check the specific requirements with your carrier before shipping any product containing a lithium battery.
Product-Specific Shipping Restrictions
Alcohol. Shipping alcohol is regulated at both the federal and state level. Federal law prohibits using USPS to ship alcohol under any circumstances. UPS and FedEx accept alcohol shipments from licensed shippers, but both require an alcohol shipping agreement, adult signature on delivery, and compliance with the laws of both the origin and destination states. Many states prohibit or restrict direct-to-consumer alcohol shipments. If you sell alcohol online, verify the specific regulations for every state you ship to, as the penalties for violating alcohol shipping laws include federal and state fines and potential criminal charges.
Tobacco and nicotine products. The PACT Act (Prevent All Cigarette Trafficking Act) requires online sellers of cigarettes and smokeless tobacco to register with the ATF and with the tobacco tax administrators of every state they ship to, verify buyer age at the point of sale and upon delivery, pay all applicable excise taxes, and file monthly reports with state tobacco tax authorities. USPS banned the mailing of all cigarettes and smokeless tobacco products in 2021. UPS banned all tobacco and vaping product shipments the same year. FedEx continues to accept some tobacco shipments but with significant restrictions.
Food and perishables. Shipping perishable food requires compliance with FDA food safety regulations, proper cold chain packaging to maintain safe temperatures during transit, and compliance with state regulations that may require food business licenses or permits. Shipping unrefrigerated perishable food that arrives above safe temperature thresholds is a food safety violation. Use insulated packaging with gel packs or dry ice (which is itself a hazardous material requiring special labeling) and select shipping speeds that ensure delivery within the product's safe temperature window.
Firearms and ammunition. Federal law requires firearms to be shipped between Federal Firearms License (FFL) holders. A consumer cannot ship a firearm directly to another consumer without going through an FFL dealer. Ammunition can be shipped by common carriers (UPS, FedEx) but not by USPS. Both firearms and ammunition have specific carrier packaging and labeling requirements.
Plants and agricultural products. The USDA regulates the interstate shipment of plants, seeds, soil, and certain agricultural products to prevent the spread of pests and diseases. Some plants require phytosanitary certificates for interstate shipment. All plants shipped internationally must comply with the destination country's agricultural import regulations, which vary widely.
International Shipping Compliance
Shipping internationally introduces customs regulations, export controls, and destination country import restrictions. Every international shipment requires a customs declaration form accurately describing the contents, declared value, and country of origin. Deliberately misrepresenting the contents or undervaluing the shipment on customs forms is a federal crime (customs fraud) carrying fines and potential imprisonment.
The U.S. government maintains export control lists that restrict or prohibit the export of certain technologies, materials, and products to specific countries. The Commerce Department's Bureau of Industry and Security (BIS) administers the Export Administration Regulations (EAR), which cover most commercial goods. The Treasury Department's Office of Foreign Assets Control (OFAC) administers economic sanctions that prohibit transactions with specific countries, entities, and individuals. Before shipping internationally, screen your orders against the OFAC Specially Designated Nationals (SDN) list and verify that your products are not restricted for export to the destination country.
Destination countries impose their own import duties, taxes, and restrictions. The European Union charges VAT on imported goods, with rates ranging from 17% to 27% depending on the country. The UK charges 20% VAT on imports. Canada charges GST/HST. These taxes are typically the responsibility of the buyer, but confusion about who pays import duties is a leading cause of international order returns and disputes. Clearly state in your terms of service and checkout process that the buyer is responsible for import duties, taxes, and customs fees. Some sellers use Delivered Duty Paid (DDP) shipping terms and collect estimated duties at checkout to eliminate this friction, but this requires accurately calculating duties for each destination country and product category.
Labeling and Packaging Requirements
Product labeling regulations come from multiple agencies depending on the product type. The FTC's Textile Fiber Products Identification Act requires all clothing and textile products to have labels identifying the fiber content, country of origin, and manufacturer or importer. The FTC's Care Labeling Rule requires care instructions on most textile products. The Consumer Product Safety Commission (CPSC) requires specific labels on children's products including tracking information and safety certifications. The FDA requires specific labeling for food, supplements, cosmetics, and medical devices.
Country of origin labeling is required by U.S. Customs and Border Protection for all imported products. The marking must indicate the country where the product was manufactured or substantially transformed. "Made in China," "Assembled in Mexico from US components," and similar markings must be accurate and conspicuous. Selling imported products without proper country of origin markings can result in customs detention, fines, and forced re-labeling at your expense.
For sellers of private label products, labeling compliance is your responsibility even if the manufacturer produced the labels. Verify that all labels meet the relevant regulations before accepting a production run. Correcting labeling errors after products are in your warehouse costs significantly more than catching them during production.