Drop-Shipping for Overstock and Other Retailers: Sales Tax, Resale Certificates and Wholesale Registration

When you sell goods to a retailer like Overstock and ship them straight to its customer, there are two sales. The retailer sells to the customer and collects the sales tax. You sell to the retailer at wholesale, and that sale is exempt only if you hold a valid resale certificate signed by the retailer. If you have nexus in the customer's state and can't produce one, that state can tax your wholesale price. You generally need to register where your warehouse or inventory is, and North Carolina law requires wholesale merchants to register before doing business.

How is a retailer different from a marketplace for sales tax?

Most sellers know Amazon, Walmart and Etsy. Those are marketplaces: you're the seller, and the platform collects sales tax from customers under marketplace facilitator laws. You generally don't collect separately on marketplace orders, but sales outside the platform are yours to handle.

Overstock and Wayfair work mainly as suppliers' customers: the platform buys from you, sets the retail price and collects sales tax from shoppers itself. Overstock's parent says in its annual report that it presents revenue net of sales taxes and that the vast majority of orders are fulfilled by its partners (suppliers). The platform is the retailer, and you're the wholesaler. A wholesaler doesn't charge retail sales tax to the retailer, but it does need a resale certificate to prove the sale was for resale.

Start with the contract. On the same platform, being a supplier versus a marketplace seller changes the sales tax answer completely.

How do states look at a three-party drop shipment?

A drop shipment usually has three parties: you (the supplier who ships), the retailer and the end customer. The goods go from your warehouse directly to the customer's home.

The retailer's sale to the customer: the retailer is the seller, charges the customer's local rate, and files and pays.

Your sale to the retailer: the goods are delivered in the customer's state, so that state looks at this sale too. If you have nexus there and are registered, the state will ask why you didn't charge tax on your sale to the retailer. Your answer is the retailer's resale certificate.

The Multistate Tax Commission's FAQ on its uniform certificate makes the same point from the seller's side: if your buyer isn't registered to collect tax in the customer's state, that state may require you to remit tax on those sales. Whether the retailer is registered there, and whether the certificate is filled out correctly, goes straight to your risk.

Which resale certificate, and how do you collect and keep it?

Three common forms: each state's own resale or exemption certificate; the MTC Uniform Sales & Use Tax Certificate (Multijurisdiction); and the Streamlined Sales Tax (SST) Certificate of Exemption, which North Carolina issues as Form E-595E. NCDOR's exemption certificate page lists both the E-595E and the MTC multijurisdiction form.

Not every state accepts the multistate forms. Some require their own form or require the buyer to be registered in the state. Collect whatever each ship-to state requires.

Fill it out completely. Buyer name, address, tax ID, state of registration, the resale box, signature and date. The name should match the contract and the payer. Overstock's parent has changed its name three times in three years, so recheck after each change.

When to collect. Ideally before the first shipment. Many states give sellers time to obtain a certificate after the sale, but chasing a buyer for one in the middle of an audit often doesn't work.

Keep it. File certificates with the related purchase orders and invoices, organized by state. Most state audits reach back around three years, some longer, and periods with no return filed have no statute of limitations.

Where do you have to register?

Physical presence. A warehouse, employees or an office in a state, or inventory in a 3PL or a platform-managed warehouse there, generally gives you physical presence. Goods in a platform-managed warehouse are still your inventory, so ask where it is.

North Carolina. G.S. 105-164.29 requires both retailers and wholesale merchants to obtain a certificate of registration before doing business in the state, one per legal entity. A supplier with a North Carolina warehouse that only sells wholesale still registers.

Economic nexus. Most states test sales into the state, commonly $100,000 a year, with higher thresholds in some states. States count differently: some include wholesale (resale) sales toward the threshold and some count only retail, so check state by state.

After you register. File on schedule. Many states let you deduct certificate-backed wholesale sales as exempt on the return, so the tax due may be zero, but the returns still have to be filed.

What if you had nexus but didn't register or collect certificates?

Example (hypothetical numbers, to show the method): A Corp has a 3PL warehouse in State B and drop-ships as a supplier to an online retailer. In 2025 it shipped 300 orders to customers in State B, selling each to the retailer at a $90 wholesale price, or $27,000 in total. A wasn't registered in State B and never asked the retailer for a resale certificate.

In a 2026 audit, A can't produce a certificate. Assuming a 7% rate, State B can assess A $27,000 × 7% = $1,890, plus interest and penalties. The retailer already collected tax from its customers, and A will have a hard time recovering this from either of them.

Had A registered in State B and collected a valid certificate before shipping, the $27,000 would have been reported as exempt wholesale sales with no tax due. The usual fix: get the certificate from the retailer now, register in State B, and consider a voluntary disclosure for past periods, which typically shortens the look-back and can waive penalties.

Selling on marketplaces and your own site too? Keep the channels apart

Marketplaces (Amazon, Walmart, Etsy, TikTok Shop): the platform collects; on your return, deduct or separately report facilitator-collected sales as each state requires.

Retailer supply (Overstock, Wayfair): wholesale, backed by resale certificates, reported as exempt sales.

Your own website: you're the seller and collect and file in states where you have nexus.

Book the three channels separately so facilitator-collected tax and tax you owe yourself don't get mixed together on the return.

The short version

For drop-ship supply to retailers, three things matter most: confirm in the contract whether you're a supplier or a marketplace seller; register in your warehouse states and other nexus states; and collect valid resale certificates, with names matching the contract, before the first shipment.

For Overstock onboarding, its business model and entity choice, see our Overstock guide; for North Carolina registration and filing, see our North Carolina sales tax guide. Start with a free 15-minute consultation or reach us on WeChat at YCLUSA.

Sources

North Carolina G.S. 105-164.29 (certificate of registration)

NCDOR: Exemption Certificates (E-595E, MTC uniform certificate)

Multistate Tax Commission: FAQ, Uniform Sales and Use Tax Certificate

Bed Bath & Beyond, Inc. Form 10-K for 2025

Last checked: November 9, 2026

This article is general tax information, not tax, legal or investment advice for any individual situation. State sales tax rules differ; check each state's revenue department.