  Environmental effects on the transmission of a state result, in general, in a
change in the information carried by it. To mitigate this, many techniques such
as quantum error--correcting codes, decoherence--free--subspaces [Rev Mod Phys,
88(4):041001, 2016] are employed. The basic idea underlying them is to
protect/recover the state. These techniques require multi-party entanglement,
whose generation is a difficult task. Further, retrieval of information would
require complete tomography, which inevitably requires a large number of
copies. Taking this into account, in this work, a formalism has been laid down
which does not require recovery of a state. The formalism employs scaling laws
to obtain quantities that remain invariant under a noisy evolution of a state.
The information encoded in these invariant quantities can be transmitted in an
error-immune manner. Since multiparty entanglement and error
detection/correction will not be required, the proposed scheme would be
cost-effective and may be reliably employed for error-free information
transfer. Employing the formalism, we have obtained invariant quantities for
various noisy channels of a qubit and a quNit.
