diff --git a/geth/api/backend_test.go b/geth/api/backend_test.go
index 8160ad727..70597d6ea 100644
--- a/geth/api/backend_test.go
+++ b/geth/api/backend_test.go
@@ -199,15 +199,6 @@ func (s *BackendTestSuite) TestCallRPC() {
 				progress <- struct{}{}
 			},
 		},
-		{
-			`{"jsonrpc":"2.0","method":"net_version","params":[]}`, // w/o id
-			func(resultJSON string) {
-				expected := `{"jsonrpc":"2.0","id":1,"result":"4"}` + "\n"
-				s.Equal(expected, resultJSON)
-				s.T().Log("net_version: ", resultJSON)
-				progress <- struct{}{}
-			},
-		},
 		{
 			`{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}`,
 			func(resultJSON string) {
diff --git a/geth/node/rpc.go b/geth/node/rpc.go
index 2d2a831f2..cdb0a12eb 100644
--- a/geth/node/rpc.go
+++ b/geth/node/rpc.go
@@ -16,7 +16,6 @@ import (
 
 const (
 	jsonrpcVersion         = "2.0"
-	serviceMethodSeparator = "_"
 )
 
 type jsonRequest struct {
@@ -69,12 +68,6 @@ func (c *RPCManager) Call(inputJSON string) string {
 	// allow HTTP requests to block w/o
 	outputJSON := make(chan string, 1)
 	go func() {
-		inputJSON, err = c.prepare(inputJSON)
-		if err != nil {
-			outputJSON <- c.makeJSONErrorResponse(err)
-			return
-		}
-
 		httpReq := httptest.NewRequest("POST", "/", strings.NewReader(inputJSON))
 		rr := httptest.NewRecorder()
 		server.ServeHTTP(rr, httpReq)
@@ -101,34 +94,6 @@ func (c *RPCManager) Call(inputJSON string) string {
 	return c.makeJSONErrorResponse(ErrRPCServerTimeout)
 }
 
-// prepare applies necessary transformations to incoming JSON
-func (c *RPCManager) prepare(inputJSON string) (string, error) {
-	var in jsonRequest
-	if err := json.Unmarshal(json.RawMessage(inputJSON), &in); err != nil {
-		return inputJSON, err
-	}
-
-	elems := strings.Split(in.Method, serviceMethodSeparator)
-	if len(elems) != 2 {
-		return inputJSON, ErrInvalidMethod
-	}
-
-	// inject next ID
-	if in.ID == 0 {
-		c.Lock()
-		c.requestID++
-		c.Unlock()
-		in.ID = c.requestID
-	}
-
-	outputJSON, err := json.Marshal(&in)
-	if err != nil {
-		return inputJSON, err
-	}
-
-	return string(outputJSON), nil
-}
-
 // makeJSONErrorResponse returns error as JSON response
 func (c *RPCManager) makeJSONErrorResponse(err error) string {
 	response := jsonErrResponse{
diff --git a/geth/node/rpc_test.go b/geth/node/rpc_test.go
index 4a9cb0bb7..ebe522e7f 100644
--- a/geth/node/rpc_test.go
+++ b/geth/node/rpc_test.go
@@ -82,15 +82,6 @@ func (s *RPCTestSuite) TestCallRPC() {
 				progress <- struct{}{}
 			},
 		},
-		{
-			`{"jsonrpc":"2.0","method":"net_version","params":[]}`, // w/o id
-			func(resultJSON string) {
-				expected := `{"jsonrpc":"2.0","id":1,"result":"4"}` + "\n"
-				s.Equal(expected, resultJSON)
-				s.T().Log("net_version: ", resultJSON)
-				progress <- struct{}{}
-			},
-		},
 		{
 			`{"jsonrpc":"2.0","method":"net_version","params":[],"id":67}`,
 			func(resultJSON string) {