Shipping cannabis across state lines is a federal crime, even when marijuana is legal in both the state you’re sending from and the state you’re sending to. The Controlled Substances Act classifies marijuana as a Schedule I substance, and the moment a package enters the mail or a private carrier’s network bound for another state, it falls under federal jurisdiction. The only cannabis-derived product you can lawfully ship between states is hemp containing no more than 0.3% delta-9 THC by dry weight, and even that rule is set to tighten in late 2026.
Why State Legalization Doesn’t Help
More than half of U.S. states have legalized cannabis in some form, but none of that authority reaches interstate shipment. Marijuana remains a Schedule I controlled substance federally.1United States Drug Enforcement Administration. Drug Scheduling The Constitution’s Commerce Clause hands Congress the power to regulate commerce between states, and federal law overrides state legalization the instant a package crosses a border.2LII / Legal Information Institute. Commerce Clause
Two people in neighboring recreational states still cannot legally mail cannabis to each other. The package doesn’t need to pass through a prohibitionist state for the crime to occur. Dropping it into the mail or handing it to a carrier with the intent to cross any state line is enough to trigger federal drug trafficking statutes.
Rescheduling doesn’t change this. The Department of Justice has proposed moving marijuana to Schedule III, and that process was still open as of early 2026.3United States Department of Justice. Justice Department Submits Proposed Regulation to Reschedule Marijuana The Federal Register notice for the proposed rule states plainly that if marijuana moves to Schedule III, “the manufacture, distribution, dispensing, and possession of marijuana would remain subject to the applicable criminal prohibitions of the CSA.”4Federal Register. Schedules of Controlled Substances: Rescheduling of Marijuana Schedule III substances still require federal registration to distribute. Rescheduling would not open a legal channel for mailing marijuana between states.
The Hemp Exception and the 2026 Deadline
Hemp is the one cannabis product that can lawfully cross state lines. The Agriculture Improvement Act of 2018 removed hemp from the federal definition of marijuana, provided the plant material contains no more than 0.3% delta-9 THC on a dry weight basis.5eCFR. 7 CFR 990.1 – Meaning of Terms Anything above that line is still marijuana federally. The burden of proof falls on the shipper: if a product tests over 0.3% delta-9 THC, it’s treated as marijuana no matter how it was labeled.
A significant change is approaching. Under the current 2018 Farm Bill framework, the 0.3% threshold applies only to delta-9 THC, which has allowed intoxicating THCA flower and concentrates to ship as “hemp” because they pass the delta-9-only test. Section 781 of the Continuing Appropriations and Extensions Act (H.R. 5371), signed in November 2025, rewrites the federal definition of hemp to measure total tetrahydrocannabinol, including THCA. The new standard takes effect on November 12, 2026. Once it does, THCA flower, pre-rolls, and concentrates that currently move as hemp will fall under the Controlled Substances Act.
Multiple bills have been introduced to repeal or delay the change, including proposals to strike Section 781 entirely and a Senate bill that would replace the prohibition with a regulated framework carrying per-serving THC limits, age restrictions, and testing requirements. Whether any of these succeed before the November deadline is uncertain. Products that are legal to ship today may become Schedule I contraband before the year ends.
What Carriers Accept
Every major U.S. shipping carrier prohibits marijuana. The differences are in how each treats compliant hemp.
The Postal Service is a federal agency bound directly by federal drug laws, and the Postal Inspection Service actively works to intercept narcotics moving through the mail.6United States Postal Inspection Service. What We Do USPS allows hemp and hemp-derived CBD products that comply with the 0.3% THC limit, but shippers must retain compliance records for at least two years after mailing.7USPS. Domestic Shipping Prohibitions, Restrictions, and HAZMAT Hemp is prohibited in international mail, including APO, FPO, and DPO addresses.
FedEx states that customers cannot ship cannabis, THC, or marijuana-derived CBD, even if it is legal in both the origin and destination state.8FedEx ShipSource. Be Proactive About Prohibited Items Hemp-derived CBD at 0.3% THC or below is permitted for parcel services only, provided it complies with applicable laws.
UPS prohibits marijuana shipments “under any circumstances, even when marijuana is for medicinal purposes or is otherwise legal under a state’s law.”9UPS. How To Ship Hemp and CBD UPS also refuses hemp shipments from any location that also sells marijuana products, and reserves the right to dispose of any shipment containing marijuana or prohibited hemp.
DHL eCommerce prohibits domestic hemp shipments over 0.3% THC or otherwise noncompliant with federal, state, or local law. For international shipments, all hemp and hemp-based products are prohibited regardless of THC content.10DHL eCommerce. Hazardous Goods and Unacceptable Shipments
What Happens When a Package Gets Flagged
The Postal Inspection Service runs an Administrative Non-Mailability Protocol (ANP) program specifically for suspected marijuana packages. When postal employees flag a suspicious parcel, local inspectors are notified and the package is held. Inspectors then request consent from the sender or addressee to open it. If nobody responds within 21 days, the package is declared abandoned and can be opened without a warrant.11USPS Office of Inspector General. US Postal Inspection Service Handling of Suspected Marijuana Packages
If the contents are confirmed to be marijuana, they are seized and destroyed. Under the ANP program, the contents of abandoned packages generally cannot be used as direct evidence in criminal prosecutions. However, information about the package, such as the sender’s or recipient’s address, can be used to support new or ongoing criminal investigations. A single intercepted package might not lead to charges on its own, but it can build a case file that investigators use later, particularly if the same address has appeared before.
Criminal investigations outside of ANP follow a different track. When postal inspectors pursue a case aimed at prosecution, they obtain search warrants and may conduct controlled deliveries, where law enforcement delivers the package themselves and makes an arrest upon acceptance.
Risk to the Recipient
Receiving a marijuana shipment carries its own federal exposure, even if you didn’t arrange or pay for it. Prosecutors can bring possession charges under the theory of constructive possession, which means having knowledge of a substance and the ability to control it.12Legal Information Institute (LII) / Cornell Law School. Constructive Possession
Knowledge is the pressure point. If someone sends you marijuana without your knowledge, constructive possession is harder to prove because the government has to show you knew what was in the package. Evidence that you ordered, paid for, or communicated about the shipment makes the knowledge element straightforward. Accepting a package during a controlled delivery is often treated as sufficient evidence of both knowledge and intent.
Being on the receiving end doesn’t automatically reduce the severity of charges. If the quantity is large enough, recipients can face the same trafficking penalties as senders, because federal law treats possession with intent to distribute on the same footing as distribution itself.
Federal Penalties by Quantity
Interstate shipment of marijuana is prosecuted under federal drug trafficking statutes. Sentences turn primarily on quantity and whether the person has prior drug felony convictions.
- Less than 50 kilograms, first offense: up to 5 years in federal prison and a fine of up to $250,000 for an individual. A second offense doubles both the maximum prison term (10 years) and the fine ($500,000).13Office of the Law Revision Counsel. 21 USC 841 – Prohibited Acts A
- 100 to 999 kilograms: a mandatory minimum of 5 years and up to 40 years in prison, with fines up to $5,000,000 for an individual.13Office of the Law Revision Counsel. 21 USC 841 – Prohibited Acts A
- 1,000 kilograms or more: a mandatory minimum of 10 years and up to life in prison, with fines up to $10,000,000 for an individual.13Office of the Law Revision Counsel. 21 USC 841 – Prohibited Acts A
Mandatory minimums increase significantly if someone dies or suffers serious bodily injury from the substance. Every federal drug trafficking sentence also carries supervised release after prison, at least two years for a first offense and four years for a repeat offender.13Office of the Law Revision Counsel. 21 USC 841 – Prohibited Acts A
Even a small personal-use quantity technically triggers these statutes. Prosecutors have discretion over whether to charge and at what level, but the legal exposure is there regardless of amount. A federal drug conviction also brings collateral consequences: loss of eligibility for federal student aid, difficulty obtaining professional licenses, and potential immigration consequences for non-citizens.
Property Seizure Through Civil Forfeiture
Beyond criminal penalties, federal law lets the government seize property connected to drug trafficking, including cash, vehicles, and the marijuana itself, through civil asset forfeiture. The Postal Inspection Service has its own administrative forfeiture process for property seized from the mail.14Forfeiture.gov. 39 CFR 233.9 – Regulations Governing Remission or Mitigation of Administrative, Civil, and Criminal Forfeitures
If cash or other property is seized, the owner has 30 days from receiving the seizure notice to file a petition for remission or mitigation. The petition must include documentation establishing the legitimate source of the funds or property. The government’s burden of proof in civil forfeiture is lower than in criminal cases, meaning they don’t need to convict you of a crime to keep what they took.