H1b Transfer Document?

Hi everyone. I got my h1b approved in 2016. Now I am working on the H1b transfer. It is small company and I am not sure the lawyer is very clear. I know we need to provide the paystub, approval notice, offer letter, i94, passport et al. However, I have a question: is it usually required to provider all previous I20s, EADs or even resume?

Sorry for no pinyin in my computer. Thanks very much.