Due to the novel nature of experiments carried out with our materials, Addgene cannot guarantee the function of any viral vector in a specific experimental context. Addgene performs QC measures which verify the identity of the viral vector, but not the function. Upon request, within 3 years of the order being shipped, Addgene can provide the QC validation data performed on the material received.
Addgene can also provide limited technical troubleshooting support, however, note that much/all of this support is derived not from Addgene-specific data but rather from "common knowledge" (data published in the literature). We also have our crowd-sourced repository of usage data of some of our materials (AAVs and antibodies) in the Addgene DataHub - which we can help you to consult during vector selection and troubleshooting efforts.