
@AG14 since you know that you cannot insert your contact information in the papers that you write anymore because the QAD screens the papers and removes those references before the paper is released to the client, keeping the regular clients you made at the company is out of the question.
While those clients will most likely prefer to follow you as you work as an independent writer, the paper screening process has made that impossible already. However, nobody said that you cannot try to use other methods of creating a client base.
If you try your luck at the independent work sites such as UpWork (which is not recommended from my perspective), you can begin to build your regular client base there. Remember, any client whose work you get through the bidding process has the potential to become your regular client outside of the system.
So working at a more than competent level on the writing needs of the client could result in repeat business for you. From there, referrals may also help you to create a network of clients.
However, you are mistaken about your wish to create a trustworthy client list.
It is the other way around, you should hope to create a client base based upon the trust that they put into the work that you deliver. Win their trust and you will be set for years to come.