The Caran d'Ache brand works hard to ensure that only authentic, high-quality products reach consumers in the condition it intends. Accordingly, the Caran d'Ache brand offers a 90 Day money back & satisfaction guarantee for all its products. However, to ensure its high-quality standards are met for products purchased on Amazon.com, please note: The Caran d'Ache Brand will only honor its 90 Day guarantee for products purchased on Amazon.com with valid proof of purchase directly from a verified and approved seller account.