Supplier's credit application form

Esteemed colleagues, I would love to find out how you have dealt with any new supplier's credit application. specifically, 1. Do you determine the the monthly trading amount? 2. Does your organisation provide a Director's guarantee? I try not to return such forms to new suppliers (those that are not arranged by Procurement), but instead return a generic 'Letter to create a customer account' containing the essential information to create my organisation in their CRM system.