United Catalyst Corporation provides a recycling program for catalytic converters. They coordinate shipping, weigh and count incoming shipments, and send confirmations to recyclers. Recyclers can choose to receive an advance payment after 10 days or when assay results are final. The converters are decanned, milled, and mass balanced to within 1/2 of 1%. An approved lab conducts an assay test on a sample to determine final payment amounts of platinum, palladium, and rhodium recovered through smelting and refining processes.