I will discuss with K.Santi on the processing time for registering E-Customs Paperless which normally should not exceed 2 working days in practice. Anyway, I totally agree with you to manage this issue pro-actively with Sales people to help communicate to customer beforehand on this pre-requisite requirement whenever they have successfully recruited new customers.
By the way, I don't mind to jointly visit any customers who need justifications on this customs regulation. Thanks for your support.