diff --git a/include/xrpl/protocol/TER.h b/include/xrpl/protocol/TER.h
index 6d666a3fb55..afc915bc0a3 100644
--- a/include/xrpl/protocol/TER.h
+++ b/include/xrpl/protocol/TER.h
@@ -139,9 +139,7 @@ enum TEMcodes : TERUnderlyingType {
     temEMPTY_DID,
 
     temARRAY_EMPTY,
-    temARRAY_TOO_LARGE,
-    temMPT_NOT_SUPPORTED,
-    temMPT_INVALID_USAGE
+    temARRAY_TOO_LARGE
 };
 
 //------------------------------------------------------------------------------
diff --git a/src/libxrpl/protocol/TER.cpp b/src/libxrpl/protocol/TER.cpp
index 38842c34758..795ab74ca7d 100644
--- a/src/libxrpl/protocol/TER.cpp
+++ b/src/libxrpl/protocol/TER.cpp
@@ -189,8 +189,6 @@ transResults()
         MAKE_ERROR(temEMPTY_DID,                 "Malformed: No DID data provided."),
         MAKE_ERROR(temINVALID,                   "The transaction is ill-formed."),
         MAKE_ERROR(temINVALID_FLAG,              "The transaction has an invalid flag."),
-        MAKE_ERROR(temMPT_NOT_SUPPORTED,         "MPT is not supported."),
-        MAKE_ERROR(temMPT_INVALID_USAGE,         "Invalid MPT usage."),
         MAKE_ERROR(temREDUNDANT,                 "The transaction is redundant."),
         MAKE_ERROR(temRIPPLE_EMPTY,              "PathSet with no paths."),
         MAKE_ERROR(temUNCERTAIN,                 "In process of determining result. Never returned."),
diff --git a/src/xrpld/app/tx/detail/AMMCreate.cpp b/src/xrpld/app/tx/detail/AMMCreate.cpp
index 35c4563e4d3..12fee14e6ec 100644
--- a/src/xrpld/app/tx/detail/AMMCreate.cpp
+++ b/src/xrpld/app/tx/detail/AMMCreate.cpp
@@ -42,7 +42,7 @@ AMMCreate::preflight(PreflightContext const& ctx)
         return ret;
 
     if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[sfAmount]))
-        return temMPT_NOT_SUPPORTED;
+        return temMALFORMED;
 
     if (ctx.tx.getFlags() & tfUniversalMask)
     {
diff --git a/src/xrpld/app/tx/detail/AMMDeposit.cpp b/src/xrpld/app/tx/detail/AMMDeposit.cpp
index a83a0b101c0..be6f2303e52 100644
--- a/src/xrpld/app/tx/detail/AMMDeposit.cpp
+++ b/src/xrpld/app/tx/detail/AMMDeposit.cpp
@@ -42,7 +42,7 @@ AMMDeposit::preflight(PreflightContext const& ctx)
         return ret;
 
     if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[~sfAmount]))
-        return temMPT_NOT_SUPPORTED;
+        return temMALFORMED;
 
     auto const flags = ctx.tx.getFlags();
     if (flags & tfDepositMask)
diff --git a/src/xrpld/app/tx/detail/AMMWithdraw.cpp b/src/xrpld/app/tx/detail/AMMWithdraw.cpp
index c6a70584a01..110291e9ac7 100644
--- a/src/xrpld/app/tx/detail/AMMWithdraw.cpp
+++ b/src/xrpld/app/tx/detail/AMMWithdraw.cpp
@@ -42,7 +42,7 @@ AMMWithdraw::preflight(PreflightContext const& ctx)
         return ret;
 
     if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[~sfAmount]))
-        return temMPT_NOT_SUPPORTED;
+        return temMALFORMED;
 
     auto const flags = ctx.tx.getFlags();
     if (flags & tfWithdrawMask)
diff --git a/src/xrpld/app/tx/detail/CreateCheck.cpp b/src/xrpld/app/tx/detail/CreateCheck.cpp
index 2fa1f323339..3a278eed738 100644
--- a/src/xrpld/app/tx/detail/CreateCheck.cpp
+++ b/src/xrpld/app/tx/detail/CreateCheck.cpp
@@ -38,9 +38,6 @@ CreateCheck::preflight(PreflightContext const& ctx)
     if (!isTesSuccess(ret))
         return ret;
 
-    if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[sfSendMax]))
-        return temMPT_NOT_SUPPORTED;
-
     if (ctx.tx.getFlags() & tfUniversalMask)
     {
         // There are no flags (other than universal) for CreateCheck yet.
diff --git a/src/xrpld/app/tx/detail/CreateOffer.cpp b/src/xrpld/app/tx/detail/CreateOffer.cpp
index 7a6a723bac8..2a5145594a1 100644
--- a/src/xrpld/app/tx/detail/CreateOffer.cpp
+++ b/src/xrpld/app/tx/detail/CreateOffer.cpp
@@ -45,10 +45,6 @@ CreateOffer::preflight(PreflightContext const& ctx)
     if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
-    if (ctx.rules.enabled(featureMPTokensV1) &&
-        (isMPT(ctx.tx[sfTakerPays]) || isMPT(ctx.tx[sfTakerGets])))
-        return temMPT_NOT_SUPPORTED;
-
     auto& tx = ctx.tx;
     auto& j = ctx.j;
 
diff --git a/src/xrpld/app/tx/detail/NFTokenCreateOffer.cpp b/src/xrpld/app/tx/detail/NFTokenCreateOffer.cpp
index 0f42fadb316..4321253204d 100644
--- a/src/xrpld/app/tx/detail/NFTokenCreateOffer.cpp
+++ b/src/xrpld/app/tx/detail/NFTokenCreateOffer.cpp
@@ -37,7 +37,7 @@ NFTokenCreateOffer::preflight(PreflightContext const& ctx)
         return ret;
 
     if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[sfAmount]))
-        return temMPT_NOT_SUPPORTED;
+        return temMALFORMED;
 
     auto const txFlags = ctx.tx.getFlags();
 
diff --git a/src/xrpld/app/tx/detail/NFTokenMint.cpp b/src/xrpld/app/tx/detail/NFTokenMint.cpp
index 30834df70f0..bea1fee4b7e 100644
--- a/src/xrpld/app/tx/detail/NFTokenMint.cpp
+++ b/src/xrpld/app/tx/detail/NFTokenMint.cpp
@@ -54,7 +54,7 @@ NFTokenMint::preflight(PreflightContext const& ctx)
         return ret;
 
     if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[~sfAmount]))
-        return temMPT_NOT_SUPPORTED;
+        return temMALFORMED;
 
     // Prior to fixRemoveNFTokenAutoTrustLine, transfer of an NFToken between
     // accounts allowed a TrustLine to be added to the issuer of that token
diff --git a/src/xrpld/app/tx/detail/Payment.cpp b/src/xrpld/app/tx/detail/Payment.cpp
index ea18e79e935..5e9293c164f 100644
--- a/src/xrpld/app/tx/detail/Payment.cpp
+++ b/src/xrpld/app/tx/detail/Payment.cpp
@@ -185,14 +185,17 @@ preflightHelper(PreflightContext const& ctx)
         JLOG(j.trace()) << "Malformed transaction: "
                         << "Paths specified for XRP to XRP or MPT to MPT.";
         if (bMPTDirect)
-            return temMPT_NOT_SUPPORTED;
+            return temMALFORMED;
         return temBAD_SEND_XRP_PATHS;
     }
-    if (bXRPDirect && partialPaymentAllowed)
+    if (bDirect && partialPaymentAllowed)
     {
         // Consistent but redundant transaction.
-        JLOG(j.trace()) << "Malformed transaction: "
-                        << "Partial payment specified for XRP to XRP.";
+        JLOG(j.trace())
+            << "Malformed transaction: "
+            << "Partial payment specified for XRP to XRP or MPT to MPT.";
+        if (bMPTDirect)
+            return temMALFORMED;
         return temBAD_SEND_XRP_PARTIAL;
     }
     if (bDirect && limitQuality)
@@ -202,7 +205,7 @@ preflightHelper(PreflightContext const& ctx)
             << "Malformed transaction: "
             << "Limit quality specified for XRP to XRP or MPT to MPT.";
         if (bMPTDirect)
-            return temMPT_NOT_SUPPORTED;
+            return temMALFORMED;
         return temBAD_SEND_XRP_LIMIT;
     }
     if (bDirect && !defaultPathsAllowed)
@@ -212,7 +215,7 @@ preflightHelper(PreflightContext const& ctx)
             << "Malformed transaction: "
             << "No ripple direct specified for XRP to XRP or MPT to MPT.";
         if (bMPTDirect)
-            return temMPT_NOT_SUPPORTED;
+            return temMALFORMED;
         return temBAD_SEND_XRP_NO_DIRECT;
     }
 
diff --git a/src/xrpld/app/tx/detail/XChainBridge.cpp b/src/xrpld/app/tx/detail/XChainBridge.cpp
index e7f0253e462..f611aed7d48 100644
--- a/src/xrpld/app/tx/detail/XChainBridge.cpp
+++ b/src/xrpld/app/tx/detail/XChainBridge.cpp
@@ -1215,7 +1215,7 @@ attestationPreflight(PreflightContext const& ctx)
         return ret;
 
     if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[sfAmount]))
-        return temMPT_NOT_SUPPORTED;
+        return temMALFORMED;
 
     if (ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;
@@ -1676,7 +1676,7 @@ XChainClaim::preflight(PreflightContext const& ctx)
         return ret;
 
     if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[sfAmount]))
-        return temMPT_NOT_SUPPORTED;
+        return temMALFORMED;
 
     if (ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;
@@ -1917,7 +1917,7 @@ XChainCommit::preflight(PreflightContext const& ctx)
         return ret;
 
     if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[sfAmount]))
-        return temMPT_NOT_SUPPORTED;
+        return temMALFORMED;
 
     if (ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;
@@ -2035,10 +2035,6 @@ XChainCreateClaimID::preflight(PreflightContext const& ctx)
     if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
-    if (ctx.rules.enabled(featureMPTokensV1) &&
-        isMPT(ctx.tx[sfSignatureReward]))
-        return temMPT_NOT_SUPPORTED;
-
     if (ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;
 
@@ -2194,9 +2190,8 @@ XChainCreateAccountCommit::preflight(PreflightContext const& ctx)
     if (auto const ret = preflight1(ctx); !isTesSuccess(ret))
         return ret;
 
-    if (ctx.rules.enabled(featureMPTokensV1) &&
-        (isMPT(ctx.tx[sfAmount]) || isMPT(ctx.tx[sfSignatureReward])))
-        return temMPT_NOT_SUPPORTED;
+    if (ctx.rules.enabled(featureMPTokensV1) && isMPT(ctx.tx[sfAmount]))
+        return temMALFORMED;
 
     if (ctx.tx.getFlags() & tfUniversalMask)
         return temINVALID_FLAG;