
In my opinion, any academic outsourcing company that requires such vital private information is up to no good.
Either they plan on blackmailing you in the future or, they plan on using the information for the purposes of identity theft. Either way, I would not deal with a company that doesn't uphold the privacy rights of the client.
They get enough private information when they receive the electronic payment as it is.
So there is no need for the client to fill out that information in the order page. Besides, they hate calling the clients.
They prefer emails so that they can hide their identities from the student.
If a website requires this information, you should find another site to work with. Normally, when a site uses PayPal, they don't require any additional information from the client during the sign up process.
Just the email address of the client for contact purposes. Some of the companies claim they need the number to call the clients, which is total BS because they only make phone calls when prodded to by the writers during times when they know that their call will go directly to voice mail.