1. Credit card collection specialist is responsible for dunning. \x0d\2。 It mainly classifies customers who are in arrears, reminds customers who are in arrears for a short time, carries out door-to-door collection for customers who are in arrears for a long time, and legally collects customers who are in arrears maliciously. \x0d\3。 Collection channels are; Telephone, door-to-door, letter, lawyer's letter, lawsuit, etc. \x0d\ To put it bluntly, it is debt collection, and the treatment is average.