Refund policy

Guarantee

30-day guarantee: if a file doesn't open, if the content isn't what the product page describes, if you were charged twice or the email never arrived, write to us and we'll refund you in full. Ask for the refund within 30 days of purchase, writing to hello@diagrambooks.com with the email you used to buy. The guarantee is in addition to, not instead of, your legal rights.

Canada

If you buy from Canada, the consumer protection legislation of your province or territory applies (for example, Ontario's Consumer Protection Act, 2002) and may give you cancellation or refund rights in addition to the guarantee above; nothing in this policy limits them. Your provincial or territorial consumer protection office can tell you which rules apply.

How refunds are made

Refunds are approved by the store and made to the payment method used for the purchase, through the payment provider. How long it takes to show depends on your bank or card.

Contact

Questions: hello@diagrambooks.com.

Last updated: 2026-10-23