diff --git a/design/ux/Obscuro_Gateway.md b/design/ux/Obscuro_Gateway.md
index 47bc5f9a35..de27021f5a 100644
--- a/design/ux/Obscuro_Gateway.md
+++ b/design/ux/Obscuro_Gateway.md
@@ -139,7 +139,6 @@ types: {
         { name: "name", type: "string" },
         { name: "version", type: "string" },
         { name: "chainId", type: "uint256" },
-        { name: "verifyingContract", type: "address" },
       ],
       Register: [
         { name: "userID", type: "string" },
@@ -151,7 +150,6 @@ types: {
       name: "Obscuro",
       version: "1.0",
       chainId: obscuroChainIDDecimal,
-      verifyingContract: "0x0000000000000000000000000000000000000000",
     },
     message: {
       userID: "0x"+userID,
diff --git a/go/common/viewingkey/viewing_key.go b/go/common/viewingkey/viewing_key.go
index 661e5ee241..d7ca3af128 100644
--- a/go/common/viewingkey/viewing_key.go
+++ b/go/common/viewingkey/viewing_key.go
@@ -113,7 +113,6 @@ func GetEIP712RawData(userID string, address *gethcommon.Address) ([]byte, error
 			{Name: "name", Type: "string"},
 			{Name: "version", Type: "string"},
 			{Name: "chainId", Type: "uint256"},
-			{Name: "verifyingContract", Type: "address"},
 		},
 		"Register": {
 			{Name: "userID", Type: "string"},
@@ -122,10 +121,9 @@ func GetEIP712RawData(userID string, address *gethcommon.Address) ([]byte, error
 	}
 
 	domain := apitypes.TypedDataDomain{
-		Name:              "Obscuro",
-		Version:           "1.0",
-		ChainId:           (*math.HexOrDecimal256)(big.NewInt(443)),
-		VerifyingContract: "0x0000000000000000000000000000000000000000",
+		Name:    "Obscuro",
+		Version: "1.0",
+		ChainId: (*math.HexOrDecimal256)(big.NewInt(443)),
 	}
 
 	message := map[string]interface{}{
diff --git a/tools/walletextension/api/staticOG/javascript.js b/tools/walletextension/api/staticOG/javascript.js
index 0806e62b50..b5d0fd9f04 100644
--- a/tools/walletextension/api/staticOG/javascript.js
+++ b/tools/walletextension/api/staticOG/javascript.js
@@ -131,7 +131,6 @@ async function authenticateAccountWithObscuroGatewayEIP712(ethereum, account, us
         { name: "name", type: "string" },
         { name: "version", type: "string" },
         { name: "chainId", type: "uint256" },
-        { name: "verifyingContract", type: "address" },
       ],
       Register: [
         { name: "userID", type: "string" },
@@ -143,7 +142,6 @@ async function authenticateAccountWithObscuroGatewayEIP712(ethereum, account, us
       name: "Obscuro",
       version: "1.0",
       chainId: obscuroChainIDDecimal,
-      verifyingContract: "0x0000000000000000000000000000000000000000",
     },
     message: {
       userID: "0x"+userID,