diff --git a/include/cantera/kinetics/Kinetics.h b/include/cantera/kinetics/Kinetics.h
index 8beb6e3ea..ef7c506b3 100644
--- a/include/cantera/kinetics/Kinetics.h
+++ b/include/cantera/kinetics/Kinetics.h
@@ -119,7 +119,12 @@ public:
     Kinetics();
 
     virtual ~Kinetics();
+
+    //! @deprecated Copy constructor to be removed after Cantera 2.3 for all
+    //!     classes derived from Kinetics.
     Kinetics(const Kinetics&);
+    //! @deprecated Assignment operator to be removed after Cantera 2.3 for all
+    //!     classes derived from Kinetics.
     Kinetics& operator=(const Kinetics& right);
 
     //! Duplication routine for objects which inherit from Kinetics
@@ -132,6 +137,8 @@ public:
      *
      * @param  tpVector Vector of pointers to ThermoPhase objects. this is the
      *                  #m_thermo vector within this object
+     * @deprecated To be removed after Cantera 2.3 for all classes derived from
+     *     Kinetics.
      */
     virtual Kinetics* duplMyselfAsKinetics(const std::vector<thermo_t*> & tpVector) const;
 
@@ -151,6 +158,8 @@ public:
      *
      *  @param tpVector Vector of pointers to ThermoPhase objects. this is the
      *         #m_thermo vector within this object
+     * @deprecated To be removed after Cantera 2.3 for all classes derived from
+     *     Kinetics.
      */
     virtual void assignShallowPointers(const std::vector<thermo_t*> & tpVector);
 
diff --git a/include/cantera/numerics/ResidJacEval.h b/include/cantera/numerics/ResidJacEval.h
index 0c548dd07..786d93904 100644
--- a/include/cantera/numerics/ResidJacEval.h
+++ b/include/cantera/numerics/ResidJacEval.h
@@ -57,7 +57,9 @@ public:
      */
     ResidJacEval(doublereal atol = 1.0e-13);
 
+    //! @deprecated To be removed after Cantera 2.3.
     ResidJacEval(const ResidJacEval& right);
+    //! @deprecated To be removed after Cantera 2.3.
     ResidJacEval& operator=(const ResidJacEval& right);
 
     //! Duplication routine for objects derived from residJacEval
@@ -68,6 +70,7 @@ public:
      *
      * These routines are basically wrappers around the derived copy
      * constructor.
+     * @deprecated To be removed after Cantera 2.3.
      */
     virtual ResidJacEval* duplMyselfAsResidJacEval() const;
 
diff --git a/include/cantera/numerics/RootFind.h b/include/cantera/numerics/RootFind.h
index 3e0f26d2b..36bba96e6 100644
--- a/include/cantera/numerics/RootFind.h
+++ b/include/cantera/numerics/RootFind.h
@@ -140,8 +140,10 @@ public:
      */
     RootFind(ResidEval* resid);
 
+    //! @deprecated To be removed after Cantera 2.3.
     RootFind(const RootFind& r);
     ~RootFind() {}
+    //! @deprecated To be removed after Cantera 2.3.
     RootFind& operator=(const RootFind& right);
 
 private:
diff --git a/include/cantera/thermo/MultiSpeciesThermo.h b/include/cantera/thermo/MultiSpeciesThermo.h
index b49d7da51..30928bf3c 100644
--- a/include/cantera/thermo/MultiSpeciesThermo.h
+++ b/include/cantera/thermo/MultiSpeciesThermo.h
@@ -45,7 +45,9 @@ public:
     //! Constructor
     MultiSpeciesThermo();
 
+    //! @deprecated To be removed after Cantera 2.3.
     MultiSpeciesThermo(const MultiSpeciesThermo& b);
+    //! @deprecated To be removed after Cantera 2.3.
     MultiSpeciesThermo& operator=(const MultiSpeciesThermo& b);
     virtual ~MultiSpeciesThermo() {}
 
diff --git a/include/cantera/thermo/PDSS.h b/include/cantera/thermo/PDSS.h
index 2eaeef3d4..89c35be35 100644
--- a/include/cantera/thermo/PDSS.h
+++ b/include/cantera/thermo/PDSS.h
@@ -193,7 +193,11 @@ public:
      */
     PDSS(VPStandardStateTP* tp, size_t spindex);
 
+    //! @deprecated Copy constructor to be removed after Cantera 2.3 for all
+    //!     classes derived from PDSS.
     PDSS(const PDSS& b);
+    //! @deprecated Assignment operator to be removed after Cantera 2.3 for all
+    //!     classes derived from PDSS.
     PDSS& operator=(const PDSS& b);
     virtual ~PDSS() {}
 
@@ -203,6 +207,8 @@ public:
      * if the application only has a pointer to PDSS to work with.
      *
      * @return A pointer to the base PDSS object type
+     * @deprecated To be removed after Cantera 2.3 for all classes derived from
+     *     PDSS.
      */
     virtual PDSS* duplMyselfAsPDSS() const;
 
@@ -520,6 +526,8 @@ public:
      * @param spthermo_ptr   Pointer to the optional MultiSpeciesThermo object
      *                       that will handle the calculation of the reference
      *                       state thermodynamic coefficients.
+     * @deprecated To be removed after Cantera 2.3 for all classes derived from
+     *     PDSS.
      */
     virtual void initAllPtrs(VPStandardStateTP* vptp_ptr, VPSSMgr* vpssmgr_ptr,
                              MultiSpeciesThermo* spthermo_ptr);
diff --git a/include/cantera/thermo/Species.h b/include/cantera/thermo/Species.h
index f12773e18..549b109f4 100644
--- a/include/cantera/thermo/Species.h
+++ b/include/cantera/thermo/Species.h
@@ -26,7 +26,9 @@ public:
     Species(const std::string& name, const compositionMap& comp,
             double charge=0.0, double size=1.0);
 
+    //! @deprecated To be removed after Cantera 2.3.
     Species(const Species& other);
+    //! @deprecated To be removed after Cantera 2.3.
     Species& operator=(const Species& other);
     ~Species();
 
diff --git a/include/cantera/thermo/SpeciesThermoInterpType.h b/include/cantera/thermo/SpeciesThermoInterpType.h
index 86b7da06b..1d003db92 100644
--- a/include/cantera/thermo/SpeciesThermoInterpType.h
+++ b/include/cantera/thermo/SpeciesThermoInterpType.h
@@ -123,10 +123,17 @@ public:
 
     SpeciesThermoInterpType(double tlow, double thigh, double pref);
 
+    //! @deprecated Copy constructor to be removed after Cantera 2.3 for all
+    //!     classes derived from SpeciesThermoInterpType.
     SpeciesThermoInterpType(const SpeciesThermoInterpType& b);
+    //! @deprecated Assignment operator to be removed after Cantera 2.3 for all
+    //!     classes derived from SpeciesThermoInterpType.
+    SpeciesThermoInterpType& operator=(const SpeciesThermoInterpType& b);
 
     virtual ~SpeciesThermoInterpType() {}
 
+    //!  @deprecated To be removed after Cantera 2.3 for all classes derived
+    //!      from SpeciesThermoInterpType.
     virtual SpeciesThermoInterpType*
     duplMyselfAsSpeciesThermoInterpType() const = 0;
 
diff --git a/include/cantera/thermo/ThermoPhase.h b/include/cantera/thermo/ThermoPhase.h
index 5f4a230ec..0a3dbc690 100644
--- a/include/cantera/thermo/ThermoPhase.h
+++ b/include/cantera/thermo/ThermoPhase.h
@@ -97,7 +97,12 @@ public:
     ThermoPhase();
 
     virtual ~ThermoPhase();
+
+    //! @deprecated Copy constructor to be removed after Cantera 2.3 for all
+    //!     classes derived from ThermoPhase.
     ThermoPhase(const ThermoPhase& right);
+    //! @deprecated Assignment operator to be removed after Cantera 2.3 for all
+    //!     classes derived from ThermoPhase.
     ThermoPhase& operator=(const ThermoPhase& right);
 
     //! Duplication routine for objects which inherit from ThermoPhase.
@@ -108,6 +113,8 @@ public:
     *
     *  These routines are basically wrappers around the derived copy
     *  constructor.
+    *  @deprecated To be removed after Cantera 2.3 for all classes derived from
+    *      ThermoPhase.
     */
     virtual ThermoPhase* duplMyselfAsThermoPhase() const;
 
diff --git a/include/cantera/thermo/VPSSMgr.h b/include/cantera/thermo/VPSSMgr.h
index 11ac8fe14..4dd2c3761 100644
--- a/include/cantera/thermo/VPSSMgr.h
+++ b/include/cantera/thermo/VPSSMgr.h
@@ -240,13 +240,20 @@ public:
     VPSSMgr(VPStandardStateTP* vptp_ptr, MultiSpeciesThermo* spth = 0);
 
     virtual ~VPSSMgr() {}
+
+    //! @deprecated Copy constructor to be removed after Cantera 2.3 for all
+    //!     classes derived from VPSSMgr.
     VPSSMgr(const VPSSMgr& right);
+    //! @deprecated Assignment operator to be removed after Cantera 2.3 for all
+    //!     classes derived from VPSSMgr.
     VPSSMgr& operator=(const VPSSMgr& right);
 
     //! Duplication routine for objects which derive from VPSSMgr
     /*!
      *  This function can be used to duplicate objects derived from VPSSMgr
      *  even if the application only has a pointer to VPSSMgr to work with.
+     * @deprecated To be removed after Cantera 2.3 for all classes derived from
+     *     VPSSMgr.
      */
     virtual VPSSMgr* duplMyselfAsVPSSMgr() const;
 
@@ -687,6 +694,8 @@ public:
      *
      * @param vp_ptr   Pointer to the VPStandardStateTP standard state
      * @param sp_ptr   Pointer to the MultiSpeciesThermo standard state
+     * @deprecated To be removed after Cantera 2.3 for all classes derived from
+     *     VPSSMgr.
      */
     virtual void initAllPtrs(VPStandardStateTP* vp_ptr, MultiSpeciesThermo* sp_ptr);
 
diff --git a/include/cantera/transport/TransportBase.h b/include/cantera/transport/TransportBase.h
index a33dafbcf..d6b073421 100644
--- a/include/cantera/transport/TransportBase.h
+++ b/include/cantera/transport/TransportBase.h
@@ -162,7 +162,11 @@ public:
     Transport(thermo_t* thermo=0, size_t ndim = 1);
 
     virtual ~Transport() {}
+    //! @deprecated Copy constructor to be removed after Cantera 2.3 for all
+    //!     classes derived from Transport.
     Transport(const Transport& right);
+    //! @deprecated Assignment operator to be removed after Cantera 2.3 for all
+    //!     classes derived from Transport.
     Transport& operator=(const Transport& right);
 
     //! Duplication routine for objects which inherit from Transport
@@ -173,6 +177,8 @@ public:
      *
      * These routines are basically wrappers around the derived copy
      *  constructor.
+     * @deprecated To be removed after Cantera 2.3 for all classes derived from
+     *     Transport.
      */
     // Note ->need working copy constructors and operator=() functions for all first
     virtual Transport* duplMyselfAsTransport() const;
diff --git a/src/kinetics/Kinetics.cpp b/src/kinetics/Kinetics.cpp
index 880245f53..6b41971be 100644
--- a/src/kinetics/Kinetics.cpp
+++ b/src/kinetics/Kinetics.cpp
@@ -30,12 +30,16 @@ Kinetics::~Kinetics() {}
 
 Kinetics::Kinetics(const Kinetics& right)
 {
+    warn_deprecated("Kinetics copy constructor", "To be removed after"
+        " Cantera 2.3 for all classes derived from Kinetics.");
     // Call the assignment operator
     *this = right;
 }
 
 Kinetics& Kinetics::operator=(const Kinetics& right)
 {
+    warn_deprecated("Kinetics assignment operator", "To be removed after"
+        " Cantera 2.3 for all classes derived from Kinetics.");
     // Check for self assignment.
     if (this == &right) {
         return *this;
@@ -67,6 +71,8 @@ Kinetics& Kinetics::operator=(const Kinetics& right)
 
 Kinetics* Kinetics::duplMyselfAsKinetics(const std::vector<thermo_t*> & tpVector) const
 {
+    warn_deprecated("Kinetics::duplMyselfAsKinetics",
+        "To be removed after Cantera 2.3.");
     Kinetics* ko = new Kinetics(*this);
     ko->assignShallowPointers(tpVector);
     return ko;
diff --git a/src/numerics/ResidJacEval.cpp b/src/numerics/ResidJacEval.cpp
index a9ad2c8c3..ea291ce5b 100644
--- a/src/numerics/ResidJacEval.cpp
+++ b/src/numerics/ResidJacEval.cpp
@@ -21,11 +21,15 @@ ResidJacEval::ResidJacEval(doublereal atol) :
 
 ResidJacEval::ResidJacEval(const ResidJacEval& right)
 {
+    warn_deprecated("ResidJacEval copy constructor",
+                    "To be removed after Cantera 2.3.");
     *this = right;
 }
 
 ResidJacEval& ResidJacEval::operator=(const ResidJacEval& right)
 {
+    warn_deprecated("ResidJacEval assignment operator",
+                    "To be removed after Cantera 2.3.");
     if (this == &right) {
         return *this;
     }
diff --git a/src/numerics/RootFind.cpp b/src/numerics/RootFind.cpp
index 761e1f37b..e8b8aaa9b 100644
--- a/src/numerics/RootFind.cpp
+++ b/src/numerics/RootFind.cpp
@@ -80,11 +80,15 @@ RootFind::RootFind(const RootFind& r) :
     x_minTried_(1.0E300),
     fx_minTried_(0.0)
 {
+    warn_deprecated("RootFind copy constructor",
+                    "To be removed after Cantera 2.3.");
     *this = r;
 }
 
 RootFind& RootFind::operator=(const RootFind& right)
 {
+    warn_deprecated("RootFind assignment operator",
+                    "To be removed after Cantera 2.3.");
     if (this == &right) {
         return *this;
     }
diff --git a/src/thermo/MultiSpeciesThermo.cpp b/src/thermo/MultiSpeciesThermo.cpp
index 6c74bbebe..8d2a66b05 100644
--- a/src/thermo/MultiSpeciesThermo.cpp
+++ b/src/thermo/MultiSpeciesThermo.cpp
@@ -28,6 +28,8 @@ MultiSpeciesThermo::MultiSpeciesThermo(const MultiSpeciesThermo& b) :
     m_thigh_min(b.m_thigh_min),
     m_p0(b.m_p0)
 {
+    warn_deprecated("MultiSpeciesThermo copy constructor",
+        "To be removed after Cantera 2.3");
     m_sp.clear();
     // Copy SpeciesThermoInterpTypes from 'b'
     for (const auto& sp : b.m_sp) {
@@ -43,6 +45,8 @@ MultiSpeciesThermo::MultiSpeciesThermo(const MultiSpeciesThermo& b) :
 MultiSpeciesThermo&
 MultiSpeciesThermo::operator=(const MultiSpeciesThermo& b)
 {
+    warn_deprecated("MultiSpeciesThermo assignment operator",
+        "To be removed after Cantera 2.3");
     if (&b == this) {
         return *this;
     }
diff --git a/src/thermo/PDSS.cpp b/src/thermo/PDSS.cpp
index b05c38f66..0d65f74fd 100644
--- a/src/thermo/PDSS.cpp
+++ b/src/thermo/PDSS.cpp
@@ -94,6 +94,8 @@ PDSS::PDSS(const PDSS& b) :
     m_gss_RT_ptr(b.m_gss_RT_ptr),
     m_Vss_ptr(b.m_Vss_ptr)
 {
+    warn_deprecated("PDSS copy constructor", "To be removed after"
+        " Cantera 2.3 for all classes derived from PDSS.");
     // Use the assignment operator to do the brunt of the work for the copy
     // constructor.
     *this = b;
@@ -101,6 +103,8 @@ PDSS::PDSS(const PDSS& b) :
 
 PDSS& PDSS::operator=(const PDSS& b)
 {
+    warn_deprecated("PDSS assignment operator", "To be removed after"
+        " Cantera 2.3 for all classes derived from PDSS.");
     if (&b == this) {
         return *this;
     }
@@ -150,6 +154,8 @@ PDSS& PDSS::operator=(const PDSS& b)
 
 PDSS* PDSS::duplMyselfAsPDSS() const
 {
+    warn_deprecated("PDSS::duplMyselfAsPDSS",
+        "To be removed after Cantera 2.3.");
     return new PDSS(*this);
 }
 
@@ -179,6 +185,8 @@ void PDSS::initThermo()
 void PDSS::initAllPtrs(VPStandardStateTP* tp, VPSSMgr* vpssmgr_ptr,
                        MultiSpeciesThermo* spthermo)
 {
+    warn_deprecated("PDSS::initAllPtrs", "To be removed after Cantera 2.3 "
+        "for all classes derived from PDSS.");
     m_tp = tp;
     m_vpssmgr_ptr = vpssmgr_ptr;
     m_spthermo = spthermo;
diff --git a/src/thermo/Species.cpp b/src/thermo/Species.cpp
index 82a9847a3..acdaca7f1 100644
--- a/src/thermo/Species.cpp
+++ b/src/thermo/Species.cpp
@@ -36,6 +36,8 @@ Species::Species(const Species& other)
     , size(other.size)
     , transport(other.transport)
 {
+    warn_deprecated("Species copy constructor",
+                    "To be removed after Cantera 2.3.");
     if (other.thermo) {
         thermo.reset(other.thermo->duplMyselfAsSpeciesThermoInterpType());
     }
@@ -43,6 +45,8 @@ Species::Species(const Species& other)
 
 Species& Species::operator=(const Species& other)
 {
+    warn_deprecated("Species assignment operator",
+                    "To be removed after Cantera 2.3.");
     if (this == &other) {
         return *this;
     }
diff --git a/src/thermo/SpeciesThermoInterpType.cpp b/src/thermo/SpeciesThermoInterpType.cpp
index 50ca29e8d..ee5d2df7a 100644
--- a/src/thermo/SpeciesThermoInterpType.cpp
+++ b/src/thermo/SpeciesThermoInterpType.cpp
@@ -31,6 +31,20 @@ SpeciesThermoInterpType::SpeciesThermoInterpType(const SpeciesThermoInterpType &
     m_highT(b.m_highT),
     m_Pref(b.m_Pref)
 {
+    warn_deprecated("SpeciesThermoInterpType copy constructor",
+                    "To be removed after Cantera 2.3.");
+}
+
+SpeciesThermoInterpType& SpeciesThermoInterpType::operator=(const SpeciesThermoInterpType& b)
+{
+    warn_deprecated("SpeciesThermoInterpType assignment operator",
+                    "To be removed after Cantera 2.3.");
+    if (&b != this) {
+        m_lowT = b.m_lowT;
+        m_highT = b.m_highT;
+        m_Pref = b.m_Pref;
+    }
+    return *this;
 }
 
 void SpeciesThermoInterpType::updateProperties(const doublereal* tempPoly,
diff --git a/src/thermo/ThermoPhase.cpp b/src/thermo/ThermoPhase.cpp
index 8da3ac243..d8a681cbd 100644
--- a/src/thermo/ThermoPhase.cpp
+++ b/src/thermo/ThermoPhase.cpp
@@ -49,12 +49,16 @@ ThermoPhase::ThermoPhase(const ThermoPhase& right)  :
     m_chargeNeutralityNecessary(false),
     m_ssConvention(cSS_CONVENTION_TEMPERATURE)
 {
+    warn_deprecated("ThermoPhase copy constructor", "To be removed after"
+        " Cantera 2.3 for all classes derived from ThermoPhase.");
     // Call the assignment operator
     *this = right;
 }
 
 ThermoPhase& ThermoPhase::operator=(const ThermoPhase& right)
 {
+    warn_deprecated("ThermoPhase assignment operator", "To be removed after"
+        " Cantera 2.3 for all classes derived from ThermoPhase.");
     // Check for self assignment.
     if (this == &right) {
         return *this;
@@ -90,6 +94,8 @@ ThermoPhase& ThermoPhase::operator=(const ThermoPhase& right)
 
 ThermoPhase* ThermoPhase::duplMyselfAsThermoPhase() const
 {
+    warn_deprecated("ThermoPhase::duplMyselfAsThermoPhase",
+        "To be removed after Cantera 2.3.");
     return new ThermoPhase(*this);
 }
 
diff --git a/src/thermo/VPSSMgr.cpp b/src/thermo/VPSSMgr.cpp
index 8c961c548..4f95137e3 100644
--- a/src/thermo/VPSSMgr.cpp
+++ b/src/thermo/VPSSMgr.cpp
@@ -54,11 +54,15 @@ VPSSMgr::VPSSMgr(const VPSSMgr& right) :
     m_useTmpRefStateStorage(false),
     m_useTmpStandardStateStorage(false)
 {
+    warn_deprecated("VPSSMgr copy constructor", "To be removed after"
+        " Cantera 2.3 for all classes derived from VPSSMgr.");
     *this = right;
 }
 
 VPSSMgr& VPSSMgr::operator=(const VPSSMgr& right)
 {
+    warn_deprecated("VPSSMgr assignment operator", "To be removed after"
+        " Cantera 2.3 for all classes derived from VPSSMgr.");
     if (&right == this) {
         return *this;
     }
@@ -111,12 +115,16 @@ VPSSMgr& VPSSMgr::operator=(const VPSSMgr& right)
 
 VPSSMgr* VPSSMgr::duplMyselfAsVPSSMgr() const
 {
+    warn_deprecated("VPSSMgr::duplMyselfAsVPSSMgr", "To be removed after"
+        " Cantera 2.3 for all classes derived from VPSSMgr.");
     return new VPSSMgr(*this);
 }
 
 void VPSSMgr::initAllPtrs(VPStandardStateTP* vp_ptr,
                           MultiSpeciesThermo* sp_ptr)
 {
+    warn_deprecated("VPSSMgr::initAllPtrs", "To be removed after Cantera 2.3 "
+        "for all classes derived from VPSSMgr.");
     m_vptp_ptr = vp_ptr;
     m_spthermo = sp_ptr;
 
diff --git a/src/transport/TransportBase.cpp b/src/transport/TransportBase.cpp
index d862611c2..bed4377ca 100644
--- a/src/transport/TransportBase.cpp
+++ b/src/transport/TransportBase.cpp
@@ -19,6 +19,8 @@ Transport::Transport(thermo_t* thermo, size_t ndim) :
 
 Transport::Transport(const Transport& right)
 {
+    warn_deprecated("Transport copy constructor", "To be removed after"
+        " Cantera 2.3 for all classes derived from Transport.");
     m_thermo = right.m_thermo;
     m_ready = right.m_ready;
     m_nsp = right.m_nsp;
@@ -28,6 +30,8 @@ Transport::Transport(const Transport& right)
 
 Transport& Transport::operator=(const Transport& right)
 {
+    warn_deprecated("Transport assignment operator", "To be removed after"
+        " Cantera 2.3 for all classes derived from Transport.");
     if (&right != this) {
         return *this;
     }
@@ -41,6 +45,8 @@ Transport& Transport::operator=(const Transport& right)
 
 Transport* Transport::duplMyselfAsTransport() const
 {
+    warn_deprecated("Transport::duplMyselfAsTransport",
+        "To be removed after Cantera 2.3.");
     return new Transport(*this);
 }
 
diff --git a/test/thermo/nasapoly.cpp b/test/thermo/nasapoly.cpp
index e71b9e726..89c2f5bb3 100644
--- a/test/thermo/nasapoly.cpp
+++ b/test/thermo/nasapoly.cpp
@@ -58,20 +58,6 @@ TEST_F(NasaPoly1Test, Initialization)
     EXPECT_EQ(poly.refPressure(), 101325.0);
 }
 
-TEST_F(NasaPoly1Test, Copy)
-{
-    NasaPoly1 q(poly);
-    testEquivalent(poly, q);
-}
-
-TEST_F(NasaPoly1Test, Assignment)
-{
-    double c[] = {1, 2, 3, 4 ,5 ,6, 7};
-    NasaPoly1 q(0, 0, 0, c);
-    q = poly;
-    testEquivalent(poly, q);
-}
-
 TEST_F(NasaPoly1Test, updateProperties)
 {
     double cp_R, h_RT, s_R;
diff --git a/test_problems/cathermo/HMW_dupl_test/HMW_dupl_test.cpp b/test_problems/cathermo/HMW_dupl_test/HMW_dupl_test.cpp
index d3bbe3b12..e23786252 100644
--- a/test_problems/cathermo/HMW_dupl_test/HMW_dupl_test.cpp
+++ b/test_problems/cathermo/HMW_dupl_test/HMW_dupl_test.cpp
@@ -14,6 +14,7 @@ using namespace Cantera;
 
 int main(int argc, char** argv)
 {
+    suppress_deprecation_warnings();
     int retn = 0;
     size_t i;