Thank you for choosing DUO SEVEN. We are committed to providing high-quality dietary supplement products and a simple, reliable shopping experience. If you have any issues with your order or product, our customer service team is always here to help.

30-Day Satisfaction Guarantee

At DUO SEVEN, we want you to feel confident when trying our products.

If you are not satisfied with your purchase, you may contact us within 30 days of receiving your order to request a return or exchange. Our customer service team will review your request and assist you with the next steps.

Please note:

• Return or exchange requests must be submitted within 30 days of delivery.
• All returns or exchanges must be approved by the DUO SEVEN customer service team before sending any items back.
• Any unauthorized returns sent without prior approval may not be accepted or processed.

New Customers Only: 30-Day Money-Back Guarantee

If this is your first order and you’re not satisfied for any reason, contact us within 30 days of delivery for a refund of the eligible order amount.

Return & Exchange Conditions

1. Product Issues or Shipping-Related Problems

If your order has any of the following issues:

• The product arrives damaged;
• The package is leaking or defective;
• You received the wrong product;
• The issue was caused by shipping or fulfillment errors;

please contact us as soon as possible.

For returns or exchanges caused by product defects, incorrect items, or shipping-related issues:

• DUO SEVEN will cover the return shipping costs;
• We will provide a replacement, exchange, or refund depending on the situation.

To help us resolve the issue quickly, please provide your order information and relevant photos when contacting us.

2. Returns Due to Customer Reasons

If you request a return or exchange due to personal reasons, such as:

• Ordering the wrong product;
• No longer wanting the product;
• Changing your mind about your purchase;

the following conditions apply:

• The product must meet our return requirements;
• The customer is responsible for return shipping costs.

We recommend using a trackable shipping service when returning your package to ensure it arrives safely.

Order Cancellation & Modification Policy

We understand that plans can change, and we will do our best to assist you with your order.

Before Your Order Has Been Shipped

If your order has not yet entered the shipping process, you may contact us to request:

• Order cancellation;
• Changes to order details;
• Address updates;
• Product quantity or item adjustments.

Please contact us as soon as possible:

Email: service@duoseven.com

Our customer service team will review your request and assist you if the order has not yet been processed.

After Your Order Has Been Shipped

Once your order has been processed and shipped, we are unable to modify or cancel the order, including:

• Shipping address changes;
• Product changes;
• Quantity adjustments;
• Other order information.

If you wish to return your order after shipment, please follow the return process outlined in this policy.

How to Request a Return or Exchange

To request a return or exchange, please follow these steps:

Step 1: Contact Us

Please email us within 30 days of receiving your order:

Email: service@duoseven.com

Please include:

• Order number;
• Customer name and purchase information;
• Reason for the return or exchange;
• Photos of the product or package (if applicable).

Step 2: Receive Return Instructions

Our customer service team will review your request and communicate with you regarding the next steps.

If your request is approved, we will provide the return address and instructions by email.

Please do not send any products back before receiving approval and return instructions from DUO SEVEN.

Step 3: Refund Processing

Once we receive and inspect the returned product, we will process your refund.

Refunds will be issued to your original payment method.

Please allow:

• 3–5 business days for us to process your refund after receiving the return;
• Additional time for your bank or payment provider to reflect the refund.
• Refunds apply to the eligible order amount. Any fees charged separately by banks, card issuers, or other third-party payment providers are not included.

Damaged, Missing, or Incorrect Items

If your order arrives with any of the following issues:

• Damaged product;
• Leaking or defective packaging;
• Incorrect item received;
• Missing items from your order;

please contact us as soon as possible.

Please provide:

• Order number;
• Description of the issue;
• Photos of the product and packaging.

Send all information to:

Email: service@duoseven.com

After review, DUO SEVEN will provide an appropriate solution, including replacement, exchange, or refund.

Contact Us

If you have any questions about our Returns & Refund Policy or need assistance with your order, please contact us:

Email: service@duoseven.com

Thank you for choosing DUO SEVEN. We appreciate your trust and are committed to providing you with quality products and excellent customer service.