diff --git a/src/Methods/Personal/ListAccounts.php b/src/Methods/Personal/ListAccounts.php
index 9bc4e15..a742767 100644
--- a/src/Methods/Personal/ListAccounts.php
+++ b/src/Methods/Personal/ListAccounts.php
@@ -16,6 +16,13 @@ use Web3\Methods\EthMethod;
 
 class ListAccounts extends EthMethod
 {
+    /**
+     * validators
+     * 
+     * @var array
+     */
+    protected $validators = [];
+
     /**
      * inputFormatters
      * 
diff --git a/src/Methods/Personal/NewAccount.php b/src/Methods/Personal/NewAccount.php
index 3043276..7af5fa6 100644
--- a/src/Methods/Personal/NewAccount.php
+++ b/src/Methods/Personal/NewAccount.php
@@ -13,10 +13,20 @@ namespace Web3\Methods\Personal;
 
 use InvalidArgumentException;
 use Web3\Methods\EthMethod;
+use Web3\Validators\StringValidator;
 use Web3\Formatters\StringFormatter;
 
 class NewAccount extends EthMethod
 {
+    /**
+     * validators
+     * 
+     * @var array
+     */
+    protected $validators = [
+        StringValidator::class
+    ];
+
     /**
      * inputFormatters
      * 
diff --git a/src/Methods/Personal/SendTransaction.php b/src/Methods/Personal/SendTransaction.php
index f49c5c8..733f1fb 100644
--- a/src/Methods/Personal/SendTransaction.php
+++ b/src/Methods/Personal/SendTransaction.php
@@ -13,11 +13,22 @@ namespace Web3\Methods\Personal;
 
 use InvalidArgumentException;
 use Web3\Methods\EthMethod;
+use Web3\Validators\TransactionValidator;
+use Web3\Validators\StringValidator;
 use Web3\Formatters\TransactionFormatter;
 use Web3\Formatters\StringFormatter;
 
 class SendTransaction extends EthMethod
 {
+    /**
+     * validators
+     * 
+     * @var array
+     */
+    protected $validators = [
+        TransactionValidator::class, StringValidator::class
+    ];
+
     /**
      * inputFormatters
      * 
diff --git a/src/Methods/Personal/UnlockAccount.php b/src/Methods/Personal/UnlockAccount.php
index 5a0568c..0e2155d 100644
--- a/src/Methods/Personal/UnlockAccount.php
+++ b/src/Methods/Personal/UnlockAccount.php
@@ -13,12 +13,24 @@ namespace Web3\Methods\Personal;
 
 use InvalidArgumentException;
 use Web3\Methods\EthMethod;
+use Web3\Validators\AddressValidator;
+use Web3\Validators\StringValidator;
+use Web3\Validators\QuantityValidator;
 use Web3\Formatters\AddressFormatter;
 use Web3\Formatters\StringFormatter;
 use Web3\Formatters\QuantityFormatter;
 
 class UnlockAccount extends EthMethod
 {
+    /**
+     * validators
+     * 
+     * @var array
+     */
+    protected $validators = [
+        AddressValidator::class, StringValidator::class, QuantityValidator::class
+    ];
+
     /**
      * inputFormatters
      * 
diff --git a/src/Personal.php b/src/Personal.php
index 5563581..44f09b5 100644
--- a/src/Personal.php
+++ b/src/Personal.php
@@ -103,10 +103,11 @@ class Personal
             } else {
                 $methodObject = $this->methods[$method];
             }
-            $inputs = $methodObject->transform($arguments, $methodObject->inputFormatters);
-            $methodObject->arguments = $inputs;
-
-            $this->provider->send($methodObject, $callback);
+            if ($methodObject->validate($arguments)) {
+                $inputs = $methodObject->transform($arguments, $methodObject->inputFormatters);
+                $methodObject->arguments = $inputs;
+                $this->provider->send($methodObject, $callback);
+            }
         }
     }
 
diff --git a/test/unit/PersonalBatchTest.php b/test/unit/PersonalBatchTest.php
index d15dba8..0c21cec 100644
--- a/test/unit/PersonalBatchTest.php
+++ b/test/unit/PersonalBatchTest.php
@@ -47,4 +47,28 @@ class PersonalBatchTest extends TestCase
             $this->assertTrue(is_string($data[1]));
         });
     }
+
+    /**
+     * testWrongParam
+     * 
+     * @return void
+     */
+    public function testWrongParam()
+    {
+        $this->expectException(RuntimeException::class);
+
+        $personal = $this->personal;
+
+        $personal->batch(true);
+        $personal->listAccounts();
+        $personal->newAccount($personal);
+
+        $personal->provider->execute(function ($err, $data) {
+            if ($err !== null) {
+                return $this->fail($err->getMessage());
+            }
+            $this->assertTrue(is_string($data[0]));
+            $this->assertEquals($data[1], $this->testHash);
+        });
+    }
 }
\ No newline at end of file