Compliance: EU Marketplace vs. Your Webshop

Many merchants run parallel channels: a marketplace storefront on Amazon, Etsy, or eBay, plus their own Shopify store. It is tempting to assume the compliance work is identical across both. It is not. Marketplaces absorb a share of the legal machinery, while on your own webshop, the buck stops entirely with you.

This is general information, not legal advice. Confirm specifics for your products and markets with a professional.

The fundamental difference

On a marketplace, you are one seller among thousands on a platform someone else operates. The platform sets the rules, handles much of the checkout, and — critically — carries some obligations directly. On your own webshop, you are the platform, the seller, and the data controller all at once. Every consumer-facing legal duty lands on you.

Think of it as renting a stall in a regulated market hall versus owning the whole shop. The market hall enforces certain standards for you. Your own shop is yours to make compliant, top to bottom.

Where the marketplace carries the load

Modern EU rules increasingly push obligations onto platforms:

• VAT collection on many sales. Under the EU e-commerce VAT rules, marketplaces are treated as the "deemed supplier" for certain transactions — notably imports up to EUR 150 and sales by non-EU sellers to EU consumers. In those cases the platform collects and remits VAT, not you.
• Consent and cookie banners on the marketplace domain are the platform's responsibility, because it is their site and their trackers.
• Baseline checkout compliance — button labeling, price display mechanics, and the core purchase flow — is built by the platform.
• Platform-level transparency duties under regulations like the Digital Services Act sit with the marketplace operator.

This is genuinely helpful. A small seller shipping into the EU through a deemed-supplier marketplace may never touch IOSS registration, because the platform handles the import VAT.

Where you still carry the load on a marketplace

Marketplace convenience has limits. Even on someone else's platform, you remain responsible for:

• Product safety and legality. The platform does not vouch that your goods are compliant. Mislabeled, unsafe, or restricted products are on you.
• Product information accuracy. Your listings, descriptions, and images must be truthful.
• Seller identity disclosure. EU rules require identifiable trader information; you must provide accurate business details.
• Order fulfillment and after-sales obligations to the buyer, including honoring the right of withdrawal where it applies.
• Your own VAT on transactions where you, not the platform, are the supplier (for example, an EU-based seller shipping domestically).

Where your own webshop is entirely on you

Run your own Shopify store and there is no platform to share the burden. You are solely responsible for:

• VAT registration, calculation, and remittance — OSS for intra-EU B2C sales, IOSS for low-value imports. No deemed supplier exists to do it for you.
• Cookie consent under the ePrivacy Directive, wired into Shopify's Customer Privacy API.
• The full suite of consumer disclosures: pre-contractual information, total price including taxes and shipping, delivery terms, and complaint handling.
• The right of withdrawal — presenting the cooling-off period, providing a model withdrawal form, and handling cancellations correctly under EU Directive 2023/2673.
• Correct checkout mechanics, including the "order with obligation to pay" button labeling that EU law requires.
• Terms, privacy policy, and imprint / legal notice where applicable.
• Data controller duties under the GDPR for all the customer data you collect.

This is a longer list precisely because nothing is shared. It is also where most compliance gaps appear, because merchants who started on marketplaces are used to those duties being handled for them.

The withdrawal example, concretely

The right of withdrawal illustrates the split well. On a marketplace, the platform often builds the return request flow and enforces a baseline policy across all sellers, so the mechanics are partly handled. On your own store, you must build and present it yourself — the cooling-off notice, the form, the refund workflow, the timing.

That is exactly the gap Blockly — Right of Withdrawal (available here) is built to close for Shopify merchants: it surfaces the withdrawal information and model form your own webshop legally needs but a marketplace would have provided. Moving a product from a marketplace to your own store means inheriting this obligation, and it is easy to overlook.

A practical audit for dual-channel sellers

If you sell on both, run this quick check:

1. List your channels and, for each, note who collects VAT.
2. Confirm marketplace deemed-supplier status for your import and cross-border sales so you do not double-remit.
3. On your own store, verify every self-carried duty: VAT setup, cookie consent, withdrawal presentation, disclosures, and checkout button labeling.
4. Standardize product data across channels so your listings stay accurate everywhere.
5. Keep separate records per channel; the paper trails you need differ.

The most common expensive mistake is assuming your Shopify store is "covered" the way the marketplace was. It is not. The marketplace was doing invisible work that you now own.

The bottom line

Marketplaces share the compliance burden — sometimes substantially, especially on VAT. Your own webshop shares none of it. When you expand from a marketplace to Shopify, treat it as taking on a full set of obligations, not just a new sales channel.

Map who owes what per channel, then close the gaps on the store you control. That is where the real exposure lives.