It is very important to provide documentation to show that the beneficiary is in legal immigration status if he or she wants an extension, change of status, etc. and is currently in the US. All H petitions, even those for extensions, must include documentation of the beneficiary's entire immigration history. Even if you have submitted such documentation previously, you need to submit it again for all subsequent petitions.
Beneficiaries/employees in the U.S. will provide
Beneficiaries who are not in the US do not need to provide a copy of the I-94 card but should provide copies of passport pages. If such a beneficiary was ever in the US in F, J, or H status, the visa documents (H-1 approval notices, DS-2019s, I-20s and, if OPT was granted, the EAD card copy) relevant to those periods of visa status should be submitted.