What service is used to return packages sent through USPS?

The Parcel Return Service is specifically designed for the return of packages that have been sent through the USPS. This service enables mailers to offer their customers a convenient return option, allowing recipients to return merchandise without needing to pay postage. The key feature of this service is that it streamlines the return process, making it manageable and efficient for both the sender and the recipient.

In contrast, the other options either do not exist as USPS services or are not specifically tailored for package returns. For instance, Return Priority Express may suggest a faster return method, but it doesn't exist as a named service under USPS. Similarly, First Class Return is not an official service, and Retail Return Service is not recognized as a standalone service dedicated to package returns. Thus, the Parcel Return Service stands out as the correct choice, emphasizing its role and functionality in facilitating returns through USPS.