  We derive a criteria for the detection of $d\otimes d$ dimensional negative
partial transpose (NPT) entangled state useful for teleportation. The newly
derived criteria are based on the maximum eigenvalue of the NPT entangled
state, which is easier to determine experimentally than to completely
reconstruct the state via tomography. We then illustrate our criteria by
considering a class of qubit-qubit system and qutrit-qutrit system.
