Chief executive Michael Redman was unavailable yesterday. Instead, a release was issued saying more would be known today.
"Once Charles has made his position clear in terms of future direction concerning our club, then the Blues will be in a better position to be able to comment," it said.
Jerome Kaino played for the Blues in 2012 before his move to Japan to play for Toyota, but it was the recurrence of a shoulder injury early that season which effectively prompted his move. Kaino, who starred for the All Blacks at the World Cup the previous year, needed a shoulder reconstruction which effectively ruled him out of the All Blacks so he took up a lucrative two-year offer, which, in hindsight, has probably lengthened his career.
Kaino, 32 next Monday, has just re-signed with the Blues and New Zealand Rugby for a further three years.
The news of Piutau's move has taken the gloss off that announcement, although it is understood loose forward Steven Luatua is about to recommit to the franchise and New Zealand Rugby.