Returns and Refunds

Last updated October 26, 2026.

Because these are research materials, we accept returns only on unopened, sealed products within 7 days of delivery, with a return authorization.

Unopened returns

Contact us within 7 calendar days of delivery, based on carrier tracking, with your order number for a return authorization (RMA) number. We review requests within 1 to 2 business days. Returns sent without an RMA cannot be accepted.

Products must be unopened, unused and sealed, in their original packaging with labels intact. Write the RMA number on the outside of the parcel and use a trackable, insured service.

Return shipping is at your cost unless the item was damaged, defective or wrong, and we are not responsible for returns lost or damaged in transit. There is no restocking fee on authorized returns, except that orders over $500 may carry a fee of up to 20%, at our discretion, deducted from the refund.

Damaged, defective or wrong items

Report damage or a defect within 48 hours of delivery, with your order number, photos of the product and packaging and a description of the problem. At our discretion we will replace the item or refund it in full, including original shipping, and send a prepaid return label if we need it back.

If you receive the wrong item, tell us within 7 days. We will send the correct item at no charge.

What we cannot accept

Opened, used or tampered products, items improperly stored or handled after delivery, items returned after the window or without an RMA, custom or special-order items unless defective, and items marked final sale or non-refundable.

Shipping and handling charges, return shipping and restocking fees are not refundable unless the item was defective or we made an error. Items returned late, used, incomplete or without an RMA may receive a partial refund, decided case by case.

Refunds

Refunds go to your original payment method within 5 to 10 business days of receiving and inspecting the return. Your bank may take a further 3 to 5 business days to post it. Crypto refunds are sent in USDC to an address you provide, for the dollar amount paid.

Rewards points used on a refunded order are returned to your account; points earned on it are removed.

Cancellations

You can cancel an order for a full refund until it ships. Contact us as soon as possible; once an order has shipped it follows the returns process.

Exchanges

We do not offer direct exchanges. Return the original item for a refund and place a new order.

Refused parcels and fraud

Refused or undeliverable parcels are refunded less original shipping and any restocking fee. If the address was entered incorrectly, all shipping costs are yours.

We may refuse a return or refund where we suspect fraud, and permanently close the account involved.