For each Addgene order, the Recipient Scientist must acknowledge the terms of use for the requested material by signing the Recipient Scientist Acknowledgement (RSA). The Recipient Scientist is the person in the lab who will be primarily working with the material. Some institutions may require the Principal Investigator (PI) of the recipient's lab to complete the RSA. In those cases, we ask that the Recipient Scientist forward the RSA to their PI.