iSupplier link for external user(vendors) & gathering Supplier tax form W8 & W9 via iSupplier

Team,

I have 2 questions regarding Oracle iSupplier portal implementaion as follows:

  1- How do you make your organization iSupplier link expose to your external vendors?

       a) Do you put an iSupplier link to your company's web page?

       b) Do you ask your new vendors in adavance via email, etc and then provide them with your iSupplier link ?

       c) Do you check every day your iSupplier portal to see If any new supplier are requesting to be added to your supplier database?

  2- How do you handle your new supplier's tax forms of W8 and W9?

    a) Does your new supplier submit your Tax W8 or W9 form via your compan'y web site or via mail, email, etc...