To complain to Overstock, contact their complaints line on 1–800-THE-BIG-O (843–2446). They can also be contacted by mail and online contact form if required. Overstock also provide details of independent bodies to contact if you are unable to resolve your Overstock complaint direct with the company.

Overstock.com has a rating of 2.2 stars from 1,316 reviews, indicating that most customers are generally dissatisfied with their purchases. Reviewers complaining about Overstock.com most frequently mention customer service, credit card, and business days problems.