Guarantee applies to catalog or off the shelf orders of stand-alone antibodies, PhosphoPlus® Antibody Duets, and Antibody Sampler Kits. Guarantee applies only when Cell Signaling Technology (CST) recommended protocols are used and storage conditions are followed. Guarantee applies only when samples derived from species listed on product-specific web pages; print material or datasheets are used. Species enclosed in parentheses are predicted to react based on 100% sequence homology and are not supported by the guarantee. Guarantee only valid for product purchased directly from CST or one of our authorized distributors. To request a replacement or credit, please contact your local regional office or Technical Support within 12 months of receipt of the product. In the event that the issue is not resolved following completion of the technical support form and follow up discussion with the product scientist, any product replacement or credit must be authorized by the product scientist. The guarantee does not apply to non-catalog orders including custom or bulk orders. Authorized credit corresponds to the antibody purchase price. In rare cases, product availability may limit replacement. Where possible, an alternate product will be offered. The CST Antibody Performance Guarantee is subject to change without notice and applies to antibody end-users only.