Now let's get more specific. Here are the finer points that separate a smooth operation from a costly one.

Check all documents, not just the license.

Ask for a certificate of analysis (CoA) for each batch. This shows the product's contents and that it meets safety standards. Also request proof of compliance with the FDA's premarket tobacco product application (PMTA) status if applicable. In the US, many vape products are still under review, so you want to know where yours stand.

Understand your tax obligations.

Vape products often have special excise taxes on top of sales tax. You might need to register in every state you ship to. This is a common blind spot. Use a tax automation service or consult a professional who knows vape regulations.

Set up a returns policy that protects you.

If a product arrives damaged or is defective, you need a clear process. Have a policy that covers both you and the customer, and document everything.