  We present an analysis of the sensitivity of the TESLA e+ e- collider to top
flavour-changing neutral couplings to the Z boson and photon. We consider the
cases without beam polarization, with only e- polarization and with e- and e+
polarization, showing that the use of the latter substantially enhances the
sensitivity to discover or bound these vertices. For some of the couplings the
expected LHC limits could be improved up to an order of magnitude for equal
running times.
