The former Arsenal attacking midfielder joined Wolves a year ago, but has been missing from the club's preseason this summer.
Kicker says Hinds remains in England amid claims he has lost his passport. Wolves had expected him on Monday, but he was again missing from Tuesday's training session.
Wolfsburg have stated that Hinds "allegedly" is yet to receive his travel documents to return. Asked if Hinds will be part of their squad this season, a spokesman replied: "We must clarify that."