Returns can be made on most defective products up to 3 months from the invoice date. We require the original invoice and/or packing slip as proof of purchase, and the reason for return. If defective, manufacturer may require customer to provide printed material and/or technician notes as to defective nature. Most manufacturers require this as proof in an effort to ensure better quality control. In cases of defectives we offer a replacement for the defective item. If the manufacturer determines that the product is not defective, ESI reserves the right to charge customer for the replacement product. Certain manufacturers have "special order" items which they do not consider returnable and as such ESI cannot offer returns, credits, or refunds for those items. In those cases ESI will provide customer with manufacturer information for customer to interact directly with manufacturer. Please be aware of this when ordering products online. ESI reserves the right to refuse credit, and/or pro-rate products due to the amount of usage prior to the return. Items returned due to reasons other than defectiveness are made on a case-by-case basis depending on resalability, age of sale, and may be subject to a 25% restocking fee and/or shipping costs.