If the prospective employee was ever in J status, he/she could be subject to the 212(e) two year home country requirement.
This requirement is clearly marked on the passport visa page and on the DS-2019.
If either or both of these indicators appear, the employee must have a waiver, or be able to prove that he/she spent two years in the home country after the J program was completed and such evidence must be included in the H-1 petition.
If the employee was ever subject to 212(e), the H-1 documentation must include either of these:
Failure to provide such evidence can result in denial of the H-1 petition.