diff --git a/extrinsic.go b/extrinsic.go
index 30f6bd3..b113bd5 100644
--- a/extrinsic.go
+++ b/extrinsic.go
@@ -231,7 +231,9 @@ func (g *GenericExtrinsic) Encode(opt *scaleType.ScaleDecoderOption) (string, er
 		data = data + scaleType.Encode("ExtrinsicSignature", g.SignatureRaw)                                                                                                   // signature
 		data = data + scaleType.Encode("EraExtrinsic", g.Era)                                                                                                                  // era
 		data = data + scaleType.Encode("Compact<U64>", g.Nonce)                                                                                                                // nonce
-		data = data + scaleType.Encode("Compact<Balance>", g.Tip)                                                                                                              // tip
+		if len(opt.Metadata.Extrinsic.SignedIdentifier) > 0 && utiles.SliceIndex("ChargeTransactionPayment", opt.Metadata.Extrinsic.SignedIdentifier) > -1 {
+			data = data + scaleType.Encode("Compact<Balance>", g.Tip) // tip
+		}
 		for identifier, extension := range g.SignedExtensions {
 			for _, ext := range opt.Metadata.Extrinsic.SignedExtensions {
 				if ext.Identifier == identifier {
diff --git a/types/types_test.go b/types/types_test.go
index bad9d4f..871b7c0 100644
--- a/types/types_test.go
+++ b/types/types_test.go
@@ -87,7 +87,7 @@ func Test_ComplexEnum(t *testing.T) {
 			TypeMapping: [][]string{{"a", "[[\"col1\", \"u32\"], [\"col2\", \"u32\"]]"}},
 		},
 	})
-	assert.EqualValues(t, "0100000002000000", Encode("CustomEnum", map[string]interface{}{"a": map[string]interface{}{"col1": 1, "col2": 2}}))
+	assert.EqualValues(t, "000100000002000000", Encode("CustomEnum", map[string]interface{}{"a": map[string]interface{}{"col1": 1, "col2": 2}}))
 
 }