diff --git a/ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetBlockByNumberIntegrationTest.java b/ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetBlockByNumberIntegrationTest.java
index 966cda12008..3798cbe507c 100644
--- a/ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetBlockByNumberIntegrationTest.java
+++ b/ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/frontier/EthGetBlockByNumberIntegrationTest.java
@@ -437,7 +437,7 @@ public void missingHashesOrTransactionParameter() {
 
     assertThat(thrown)
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Invalid is transaction complete parameter (index 1)");
+        .hasMessage("Invalid return complete transaction parameter (index 1)");
   }
 
   /**
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/execution/TracedJsonRpcProcessor.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/execution/TracedJsonRpcProcessor.java
index f1a799cf638..ec0e6aef64a 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/execution/TracedJsonRpcProcessor.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/execution/TracedJsonRpcProcessor.java
@@ -84,7 +84,7 @@ public JsonRpcResponse process(
         case INVALID_GAS_PRICE_PARAMS:
         case INVALID_HASH_RATE_PARAMS:
         case INVALID_ID_PARAMS:
-        case INVALID_IS_TRANSACTION_COMPLETE_PARAMS:
+        case INVALID_RETURN_COMPLETE_TRANSACTION_PARAMS:
         case INVALID_LOG_FILTER_PARAMS:
         case INVALID_LOG_LEVEL_PARAMS:
         case INVALID_MAX_RESULTS_PARAMS:
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlockByHash.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlockByHash.java
index da795439cf3..4c1d3bfc2a6 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlockByHash.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceBlockByHash.java
@@ -68,7 +68,7 @@ public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
               .orElse(TraceOptions.DEFAULT);
     } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
       throw new InvalidJsonRpcParameters(
-          "Invalid transaction trace parameters (index 1)",
+          "Invalid transaction trace parameter (index 1)",
           RpcErrorType.INVALID_TRANSACTION_TRACE_PARAMS,
           e);
     }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceCall.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceCall.java
index ad46d981ac8..d309f8dfdd8 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceCall.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/DebugTraceCall.java
@@ -62,7 +62,7 @@ protected TraceOptions getTraceOptions(final JsonRpcRequestContext requestContex
           .orElse(TraceOptions.DEFAULT);
     } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
       throw new InvalidJsonRpcParameters(
-          "Invalid transaction trace parameters (index 2)",
+          "Invalid transaction trace parameter (index 2)",
           RpcErrorType.INVALID_TRANSACTION_TRACE_PARAMS,
           e);
     }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByHash.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByHash.java
index 09b1c2f9523..875daea7f13 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByHash.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByHash.java
@@ -97,8 +97,8 @@ private boolean isCompleteTransactions(final JsonRpcRequestContext requestContex
       return requestContext.getRequiredParameter(1, Boolean.class);
     } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
       throw new InvalidJsonRpcParameters(
-          "Invalid is complete transaction parameter (index 1)",
-          RpcErrorType.INVALID_IS_TRANSACTION_COMPLETE_PARAMS,
+          "Invalid return complete transaction parameter (index 1)",
+          RpcErrorType.INVALID_RETURN_COMPLETE_TRANSACTION_PARAMS,
           e);
     }
   }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumber.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumber.java
index 5e0bc9c7ab4..8e0954144d8 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumber.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumber.java
@@ -128,8 +128,8 @@ private boolean isCompleteTransactions(final JsonRpcRequestContext request) {
       return request.getRequiredParameter(1, Boolean.class);
     } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
       throw new InvalidJsonRpcParameters(
-          "Invalid is transaction complete parameter (index 1)",
-          RpcErrorType.INVALID_IS_TRANSACTION_COMPLETE_PARAMS,
+          "Invalid return complete transaction parameter (index 1)",
+          RpcErrorType.INVALID_RETURN_COMPLETE_TRANSACTION_PARAMS,
           e);
     }
   }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceGet.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceGet.java
index a1460c5aa24..b346637ec25 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceGet.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/TraceGet.java
@@ -60,7 +60,7 @@ public JsonRpcResponse response(final JsonRpcRequestContext requestContext) {
       transactionHash = requestContext.getRequiredParameter(0, Hash.class);
     } catch (Exception e) { // TODO:replace with JsonRpcParameter.JsonRpcParameterException
       throw new InvalidJsonRpcParameters(
-          "Invalid transaction has parameter (index 0)",
+          "Invalid transaction hash parameter (index 0)",
           RpcErrorType.INVALID_TRANSACTION_HASH_PARAMS,
           e);
     }
diff --git a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/RpcErrorType.java b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/RpcErrorType.java
index cb19d2e7a35..009fca38fc0 100644
--- a/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/RpcErrorType.java
+++ b/ethereum/api/src/main/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/response/RpcErrorType.java
@@ -66,8 +66,8 @@ public enum RpcErrorType implements RpcMethodError {
   INVALID_GAS_PRICE_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid gas price params"),
   INVALID_HASH_RATE_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid hash rate params"),
   INVALID_ID_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid ID params"),
-  INVALID_IS_TRANSACTION_COMPLETE_PARAMS(
-      INVALID_PARAMS_ERROR_CODE, "Invalid is transaction complete params"),
+  INVALID_RETURN_COMPLETE_TRANSACTION_PARAMS(
+      INVALID_PARAMS_ERROR_CODE, "Invalid return complete transaction params"),
   INVALID_LOG_FILTER_PARAMS(INVALID_PARAMS_ERROR_CODE, "Invalid log filter params"),
   INVALID_LOG_LEVEL_PARAMS(
       INVALID_PARAMS_ERROR_CODE, "Invalid log level params (missing or incorrect)"),
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpServiceTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpServiceTest.java
index dcfd198d6e1..bb5cb68a2ae 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpServiceTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/JsonRpcHttpServiceTest.java
@@ -784,7 +784,7 @@ public void getBlockByHashWithMissingBooleanParameter() throws Exception {
       assertThat(resp.code()).isEqualTo(200);
       // Check general format of result
       final JsonObject json = new JsonObject(resp.body().string());
-      final RpcErrorType expectedError = RpcErrorType.INVALID_IS_TRANSACTION_COMPLETE_PARAMS;
+      final RpcErrorType expectedError = RpcErrorType.INVALID_RETURN_COMPLETE_TRANSACTION_PARAMS;
       testHelper.assertValidJsonRpcError(
           json, id, expectedError.getCode(), expectedError.getMessage());
     }
@@ -854,7 +854,7 @@ public void getBlockByHashWithInvalidBooleanParameter() throws Exception {
       assertThat(resp.code()).isEqualTo(200);
       // Check general format of result
       final JsonObject json = new JsonObject(resp.body().string());
-      final RpcErrorType expectedError = RpcErrorType.INVALID_IS_TRANSACTION_COMPLETE_PARAMS;
+      final RpcErrorType expectedError = RpcErrorType.INVALID_RETURN_COMPLETE_TRANSACTION_PARAMS;
       testHelper.assertValidJsonRpcError(
           json, id, expectedError.getCode(), expectedError.getMessage());
     }
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByHashTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByHashTest.java
index 0fc8969c938..e79fff04f7f 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByHashTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByHashTest.java
@@ -69,7 +69,7 @@ public void exceptionWhenNoHashSupplied() {
   public void exceptionWhenNoBoolSupplied() {
     assertThatThrownBy(() -> method.response(requestWithParams(ZERO_HASH)))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Invalid is complete transaction parameter (index 1)");
+        .hasMessage("Invalid return complete transaction parameter (index 1)");
     verifyNoMoreInteractions(blockchainQueries);
   }
 
@@ -85,7 +85,7 @@ public void exceptionWhenHashParamInvalid() {
   public void exceptionWhenBoolParamInvalid() {
     assertThatThrownBy(() -> method.response(requestWithParams(ZERO_HASH, "maybe")))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Invalid is complete transaction parameter (index 1)");
+        .hasMessage("Invalid return complete transaction parameter (index 1)");
     verifyNoMoreInteractions(blockchainQueries);
   }
 
diff --git a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumberTest.java b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumberTest.java
index bc6ec997f34..254d0fbe9e8 100644
--- a/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumberTest.java
+++ b/ethereum/api/src/test/java/org/hyperledger/besu/ethereum/api/jsonrpc/internal/methods/EthGetBlockByNumberTest.java
@@ -121,7 +121,7 @@ public void exceptionWhenNoNumberSupplied() {
   public void exceptionWhenNoBoolSupplied() {
     assertThatThrownBy(() -> method.response(requestWithParams("0")))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Invalid is transaction complete parameter (index 1)");
+        .hasMessage("Invalid return complete transaction parameter (index 1)");
     verifyNoMoreInteractions(blockchainQueries);
   }
 
@@ -137,7 +137,7 @@ public void exceptionWhenNumberParamInvalid() {
   public void exceptionWhenBoolParamInvalid() {
     assertThatThrownBy(() -> method.response(requestWithParams("0", "maybe")))
         .isInstanceOf(InvalidJsonRpcParameters.class)
-        .hasMessage("Invalid is transaction complete parameter (index 1)");
+        .hasMessage("Invalid return complete transaction parameter (index 1)");
     verifyNoMoreInteractions(blockchainQueries);
   }