diff --git a/src/main/scala/scorex/waves/http/WavesApiRoute.scala b/src/main/scala/scorex/waves/http/WavesApiRoute.scala
index 6df87a0bc30..f3bd320ca9f 100644
--- a/src/main/scala/scorex/waves/http/WavesApiRoute.scala
+++ b/src/main/scala/scorex/waves/http/WavesApiRoute.scala
@@ -68,21 +68,25 @@ case class WavesApiRoute(override val application: Application)(implicit val con
               WrongJson.json
             case JsSuccess(payment: ExternalPayment, _) =>
               val tx = transactionModule.broadcastPayment(payment)
-              tx.validate match {
-                case ValidationResult.ValidateOke =>
-                  tx.json
+              if (!tx.signatureValid)
+                InvalidSignature.json
+              else {
+                tx.validate match {
+                  case ValidationResult.ValidateOke =>
+                    tx.json
 
-                case ValidationResult.InvalidAddress =>
-                  InvalidAddress.json
+                  case ValidationResult.InvalidAddress =>
+                    InvalidAddress.json
 
-                case ValidationResult.NegativeAmount =>
-                  NegativeAmount.json
+                  case ValidationResult.NegativeAmount =>
+                    NegativeAmount.json
 
-                case ValidationResult.NegativeFee =>
-                  NegativeFee.json
+                  case ValidationResult.NegativeFee =>
+                    NegativeFee.json
 
-                case ValidationResult.NoBalance =>
-                  NoBalance.json
+                  case ValidationResult.NoBalance =>
+                    NoBalance.json
+                }
               }
           }
         }.getOrElse(WrongJson.json).toString