diff --git a/precompiles/bank/method_withdraw.go b/precompiles/bank/method_withdraw.go
index 66df0ca05e..e0893b08c2 100644
--- a/precompiles/bank/method_withdraw.go
+++ b/precompiles/bank/method_withdraw.go
@@ -55,7 +55,7 @@ func (c *Contract) withdraw(
 		return nil, err
 	}
 
-	// Safety check: token has to be a valid whitelisted ZRC20 and not be paused.
+	// Safety check: token has to be a non-paused whitelisted ZRC20.
 	if err := c.fungibleKeeper.IsValidZRC20(ctx, zrc20Addr); err != nil {
 		return nil, &ptypes.ErrInvalidToken{
 			Got:    zrc20Addr.String(),
diff --git a/x/fungible/keeper/zrc20_unlock_token.go b/x/fungible/keeper/zrc20_unlock_token.go
index d932e1bcd7..9d6243b2da 100644
--- a/x/fungible/keeper/zrc20_unlock_token.go
+++ b/x/fungible/keeper/zrc20_unlock_token.go
@@ -32,6 +32,14 @@ func (k Keeper) UnlockZRC20(
 		return fmt.Errorf("zrc20 address cannot be zero")
 	}
 
+	if err := k.IsValidZRC20(ctx, zrc20Address); err != nil {
+		return err
+	}
+
+	if err := k.CheckFungibleZRC20Balance(ctx, zrc20ABI, zrc20Address, amount); err != nil {
+		return err
+	}
+
 	args := []interface{}{to, amount}
 	res, err := k.CallEVM(
 		ctx,
diff --git a/x/fungible/types/keys.go b/x/fungible/types/keys.go
index 777cfd7c41..7e81328c15 100644
--- a/x/fungible/types/keys.go
+++ b/x/fungible/types/keys.go
@@ -27,17 +27,11 @@ func KeyPrefix(p string) []byte {
 }
 
 var (
-	ModuleAddress = authtypes.NewModuleAddress(ModuleName)
-	//ModuleAddressEVM common.EVMAddress
+	ModuleAddress    = authtypes.NewModuleAddress(ModuleName)
 	ModuleAddressEVM = common.BytesToAddress(ModuleAddress.Bytes())
 	AdminAddress     = "zeta1rx9r8hff0adaqhr5tuadkzj4e7ns2ntg446vtt"
 )
 
-func init() {
-	//fmt.Printf("ModuleAddressEVM of %s: %s\n", ModuleName, ModuleAddressEVM.String())
-	// 0x735b14BB79463307AAcBED86DAf3322B1e6226aB
-}
-
 const (
 	SystemContractKey = "SystemContract-value-"
 )