Can I enroll an existing order into the Payment Plan? June 17, 2020 14:42 Updated Sorry, only new orders qualify for the Partial.ly Payment Plan. Related articles STAR TREK™ Product Availability - 2021 STAR WARS™ Product Availability - 2021 Do you charge interest on Payment Plan purchases? Do I pay anything up front to use Partial.ly? When am I charged for periodic payments?