diff --git a/src/psbt.h b/src/psbt.h
--- a/src/psbt.h
+++ b/src/psbt.h
@@ -53,7 +53,6 @@
     void FillSignatureData(SignatureData &sigdata) const;
     void FromSignatureData(const SignatureData &sigdata);
     void Merge(const PSBTInput &input);
-    bool IsSane() const;
     PSBTInput() {}
 
     template <typename Stream> inline void Serialize(Stream &s) const {
@@ -239,7 +238,6 @@
     void FillSignatureData(SignatureData &sigdata) const;
     void FromSignatureData(const SignatureData &sigdata);
     void Merge(const PSBTOutput &output);
-    bool IsSane() const;
     PSBTOutput() {}
 
     template <typename Stream> inline void Serialize(Stream &s) const {
@@ -346,7 +344,6 @@
      * the merge succeeded, false otherwise.
      */
     NODISCARD bool Merge(const PartiallySignedTransaction &psbt);
-    bool IsSane() const;
     bool AddInput(const CTxIn &txin, PSBTInput &psbtin);
     bool AddOutput(const CTxOut &txout, const PSBTOutput &psbtout);
     PartiallySignedTransaction() {}
@@ -500,10 +497,6 @@
             throw std::ios_base::failure("Outputs provided does not match the "
                                          "number of outputs in transaction.");
         }
-        // Sanity check
-        if (!IsSane()) {
-            throw std::ios_base::failure("PSBT is not sane.");
-        }
     }
 
     template <typename Stream>
diff --git a/src/psbt.cpp b/src/psbt.cpp
--- a/src/psbt.cpp
+++ b/src/psbt.cpp
@@ -34,15 +34,6 @@
     return true;
 }
 
-bool PartiallySignedTransaction::IsSane() const {
-    for (PSBTInput input : inputs) {
-        if (!input.IsSane()) {
-            return false;
-        }
-    }
-    return true;
-}
-
 bool PartiallySignedTransaction::AddInput(const CTxIn &txin,
                                           PSBTInput &psbtin) {
     if (std::find(tx->vin.begin(), tx->vin.end(), txin) != tx->vin.end()) {
@@ -134,10 +125,6 @@
     }
 }
 
-bool PSBTInput::IsSane() const {
-    return true;
-}
-
 void PSBTOutput::FillSignatureData(SignatureData &sigdata) const {
     if (!redeem_script.empty()) {
         sigdata.redeem_script = redeem_script;
@@ -213,11 +200,6 @@
     // Get UTXO
     CTxOut utxo;
 
-    // Verify input sanity
-    if (!input.IsSane()) {
-        return false;
-    }
-
     if (input.utxo.IsNull()) {
         return false;
     }
@@ -289,9 +271,6 @@
             return TransactionError::PSBT_MISMATCH;
         }
     }
-    if (!out.IsSane()) {
-        return TransactionError::INVALID_PSBT;
-    }
 
     return TransactionError::OK;
 }
diff --git a/src/test/fuzz/psbt.cpp b/src/test/fuzz/psbt.cpp
--- a/src/test/fuzz/psbt.cpp
+++ b/src/test/fuzz/psbt.cpp
@@ -36,7 +36,6 @@
     }
 
     (void)psbt.IsNull();
-    (void)psbt.IsSane();
 
     std::optional<CMutableTransaction> tx = psbt.tx;
     if (tx) {
@@ -47,7 +46,6 @@
     for (const PSBTInput &input : psbt.inputs) {
         (void)PSBTInputSigned(input);
         (void)input.IsNull();
-        (void)input.IsSane();
     }
 
     for (const PSBTOutput &output : psbt.outputs) {
diff --git a/src/wallet/scriptpubkeyman.cpp b/src/wallet/scriptpubkeyman.cpp
--- a/src/wallet/scriptpubkeyman.cpp
+++ b/src/wallet/scriptpubkeyman.cpp
@@ -506,12 +506,6 @@
             continue;
         }
 
-        // Verify input looks sane. This will check that we have at most one
-        // uxto, witness or non-witness.
-        if (!input.IsSane()) {
-            return TransactionError::INVALID_PSBT;
-        }
-
         // Get the Sighash type
         if (sign && input.sighash_type.getRawSigHashType() > 0 &&
             input.sighash_type != sighash_type) {
@@ -2084,12 +2078,6 @@
             continue;
         }
 
-        // Verify input looks sane. This will check that we have at most one
-        // uxto, witness or non-witness.
-        if (!input.IsSane()) {
-            return TransactionError::INVALID_PSBT;
-        }
-
         // Get the Sighash type
         if (sign && input.sighash_type.getRawSigHashType() > 0 &&
             input.sighash_type != sighash_type) {
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -2812,11 +2812,6 @@
             continue;
         }
 
-        // Verify input looks sane.
-        if (!input.IsSane()) {
-            return TransactionError::INVALID_PSBT;
-        }
-
         // If we have no utxo, grab it from the wallet.
         if (input.utxo.IsNull()) {
             const TxId &txid = txin.prevout.GetTxId();
diff --git a/test/functional/rpc_psbt.py b/test/functional/rpc_psbt.py
--- a/test/functional/rpc_psbt.py
+++ b/test/functional/rpc_psbt.py
@@ -92,6 +92,9 @@
         rawtx = self.nodes[1].walletcreatefundedpsbt([{"txid": txid, "vout": p2pkh_pos}], {
                                                      self.nodes[1].getnewaddress(): 9.99})['psbt']
         walletprocesspsbt_out = self.nodes[1].walletprocesspsbt(rawtx)
+        # Make sure it has UTXOs
+        decoded = self.nodes[1].decodepsbt(walletprocesspsbt_out['psbt'])
+        assert 'utxo' in decoded['inputs'][0]
         assert_equal(walletprocesspsbt_out['complete'], True)
         self.nodes[1].sendrawtransaction(
             self.nodes[1].finalizepsbt(walletprocesspsbt_out['psbt'])['hex'])