Terms of service

AVANGUARDIS store terms

1. Seller and contact

The store avanguardis.com is operated by MEDVAEC Engineering Mikhail Zayats, registered in Poland’s CEIDG, Swietokrzyska 35/102, 00-049 Warsaw, Poland. VAT number: PL7010660291; REGON: 526691959. Contact: info@avanguardis.com or WhatsApp +48 512 620 195, Monday–Friday, 09:00–17:00 Polish time.

2. Orders

Select the product, variant and quantity, enter the details required for fulfilment, and choose delivery and payment. You can review and correct your order before final confirmation. Confirming with the button indicating an obligation to pay places an order with an obligation to pay. Confirmation is sent by email. A customer account is not required unless the selected purchasing method expressly requires one.

Provide accurate contact and address details. If an error or availability issue occurs, we will contact you to agree on the next steps. We will not substitute a product without your agreement. If a paid order cannot be fulfilled, the amount due will be refunded. Website price changes do not change the price of a contract already concluded.

3. Prices and payment

The product price, currency, applicable taxes, discounts and full shipping cost are shown before the order is placed. Payment methods shown at checkout include online payments, bank transfer and cash on delivery within the stated limits. Bank-transfer orders are prepared after funds arrive; cash-on-delivery orders are paid to the courier. See our shipping and payment policy.

4. Delivery

We dispatch from our own warehouse in Poland. Handling and transit are separate stages. Available countries, costs, free-shipping thresholds and estimated times are listed in our shipping policy and at checkout. Estimates do not limit your rights if delivery is delayed. When using a carrier offered by the store, the risk of accidental loss or damage passes to the consumer when the consumer, or a designated person other than the carrier, receives the goods.

5. Withdrawal and returns

Consumers may notify us of withdrawal from a distance purchase within 14 days of receiving the goods and then send them back within a further 14 days. Prior store approval is not required. For ordinary withdrawal without a product defect, the buyer pays the direct return shipping cost. We charge no restocking fee. Refund rules, the return address, a sample withdrawal statement and other conditions are in our returns and complaints policy. Processing or dispatching an order does not remove the statutory right of withdrawal.

6. Product conformity and complaints

We are responsible for product conformity under applicable law. Report problems by email, WhatsApp or post, identifying the product, issue and purchase. Consumers have statutory remedies, including repair, replacement, price reduction or withdrawal under the conditions established by law. We cover necessary transport costs relating to non-conformity. Complaints are not limited to the 14-day ordinary withdrawal period or conditional on original packaging.

7. Store use and privacy

Shopping requires an internet-connected device, an up-to-date browser and an email address. Do not submit unlawful content or disrupt the store. Protect your account credentials if you use an account. Our privacy policy explains personal data and cookies. Shopify provides the store technology; the seller and sales-contract party is the business in section 1.

8. Law and changes

Polish law applies while preserving mandatory consumer protection in your country of habitual residence. Court jurisdiction follows applicable law and is not restricted to Warsaw. Nothing excludes statutory rights of consumers or people with equivalent protection. Changes apply to future orders; earlier contracts retain the terms applicable when concluded.

Updated: 10 October 2026.