diff --git a/LoggingClient/LoggingClient/LoggingClient.csproj b/LoggingClient/LoggingClient/LoggingClient.csproj
index e6d84d7..7732333 100644
--- a/LoggingClient/LoggingClient/LoggingClient.csproj
+++ b/LoggingClient/LoggingClient/LoggingClient.csproj
@@ -117,7 +117,11 @@
     <Compile Include="Repository\LocationRepository.cs" />
     <Compile Include="Repository\LoggingRepository.cs" />
     <Compile Include="Repository\RepositoryBase.cs" />
+    <Compile Include="Validators\CustomerNumberValidationRule.cs" />
+    <Compile Include="Validators\EmailValidationRule.cs" />
     <Compile Include="Validators\IntRangeValidationRule.cs" />
+    <Compile Include="Validators\PasswordValidationRule.cs" />
+    <Compile Include="Validators\UrlValidationRule.cs" />
     <Compile Include="ViewModel\Commands\BaseCommand.cs" />
     <Compile Include="ViewModel\Commands\RelayCommand.cs" />
     <Compile Include="Validators\StringRangeValidationRule.cs" />
diff --git a/LoggingClient/LoggingClient/Validators/CustomerNumberValidationRule.cs b/LoggingClient/LoggingClient/Validators/CustomerNumberValidationRule.cs
new file mode 100644
index 0000000..33b87f2
--- /dev/null
+++ b/LoggingClient/LoggingClient/Validators/CustomerNumberValidationRule.cs
@@ -0,0 +1,32 @@
+using System.Globalization;
+using System.Text.RegularExpressions;
+using System.Windows.Controls;
+
+namespace LoggingClient.Validators
+{
+    public class CustomerNumberValidationRule : ValidationRule
+    {
+        public string ErrorMessage { get; set; }
+        
+        /// <summary>
+        /// Regex for Address Number Validation.
+        /// Beginning with CU following a 5 digit number.
+        /// </summary>
+        /// <param name="value"></param>
+        /// <param name="cultureInfo"></param>
+        /// <returns></returns>
+        public override ValidationResult Validate(object value, CultureInfo cultureInfo)
+        {
+            Regex regex = new Regex(@"^CU[0-9]{5}$");
+            Match match = regex.Match(value.ToString());
+            if (match == Match.Empty)
+            {
+                return new ValidationResult(false, ErrorMessage);
+            }
+            else
+            {
+                return ValidationResult.ValidResult;
+            }
+        }
+    }
+}
diff --git a/LoggingClient/LoggingClient/Validators/EmailValidationRule.cs b/LoggingClient/LoggingClient/Validators/EmailValidationRule.cs
new file mode 100644
index 0000000..017fc06
--- /dev/null
+++ b/LoggingClient/LoggingClient/Validators/EmailValidationRule.cs
@@ -0,0 +1,31 @@
+using System.Globalization;
+using System.Text.RegularExpressions;
+using System.Windows.Controls;
+
+namespace LoggingClient.Validators
+{
+    public class EmailValidationRule : ValidationRule
+    {
+        public string ErrorMessage { get; set; }
+        /// <summary>
+        /// Checks an Email Address if it's valid or not
+        /// Regex doesn't check if the top + subdomains are valid.
+        /// </summary>
+        /// <param name="value"></param>
+        /// <param name="cultureInfo"></param>
+        /// <returns></returns>
+        public override ValidationResult Validate(object value, CultureInfo cultureInfo)
+        {
+            Regex regex = new Regex(@"\A[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\z");
+            Match match = regex.Match(value.ToString());
+            if (match == Match.Empty)
+            {
+                return new ValidationResult(false, ErrorMessage);
+            }
+            else
+            {
+                return ValidationResult.ValidResult;
+            }
+        }
+    }
+}
diff --git a/LoggingClient/LoggingClient/Validators/PasswordValidationRule.cs b/LoggingClient/LoggingClient/Validators/PasswordValidationRule.cs
new file mode 100644
index 0000000..4ea68c0
--- /dev/null
+++ b/LoggingClient/LoggingClient/Validators/PasswordValidationRule.cs
@@ -0,0 +1,31 @@
+using System.Globalization;
+using System.Text.RegularExpressions;
+using System.Windows.Controls;
+
+namespace LoggingClient.Validators
+{
+    public class PasswordValidationRule : ValidationRule
+    {
+        public string ErrorMessage { get; set; }
+        /// <summary>
+        /// Regex for password validation
+        /// 8 - 15 characters. At least 1 upper, 1 lowercase, 1 number and 1 special character.
+        /// </summary>
+        /// <param name="value"></param>
+        /// <param name="cultureInfo"></param>
+        /// <returns></returns>
+        public override ValidationResult Validate(object value, CultureInfo cultureInfo)
+        {
+            Regex regex = new Regex(@"^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[^\da-zA-Z]).{8,15}$");
+            Match match = regex.Match(value.ToString());
+            if (match == Match.Empty)
+            {
+                return new ValidationResult(false, ErrorMessage);
+            }
+            else
+            {
+                return ValidationResult.ValidResult;
+            }
+        }
+    }
+}
diff --git a/LoggingClient/LoggingClient/Validators/UrlValidationRule.cs b/LoggingClient/LoggingClient/Validators/UrlValidationRule.cs
new file mode 100644
index 0000000..2172096
--- /dev/null
+++ b/LoggingClient/LoggingClient/Validators/UrlValidationRule.cs
@@ -0,0 +1,32 @@
+using System.Globalization;
+using System.Text.RegularExpressions;
+using System.Windows.Controls;
+
+namespace LoggingClient.Validators
+{
+    public class UrlValidationRule : ValidationRule
+    {
+        public string ErrorMessage { get; set; }
+
+        /// <summary>
+        /// Regex for url Validation.
+        /// Doesn't check if the url exists.
+        /// </summary>
+        /// <param name="value"></param>
+        /// <param name="cultureInfo"></param>
+        /// <returns></returns>
+        public override ValidationResult Validate(object value, CultureInfo cultureInfo)
+        {
+            Regex regex = new Regex(@"^(?:http(s)?:\/\/)?[\w.-]+(?:\.[\w\.-]+)+[\w\-\._~:/?#[\]@!\$&'\(\)\*\+,;=.]+$");
+            Match match = regex.Match(value.ToString());
+            if (match == Match.Empty)
+            {
+                return new ValidationResult(false, ErrorMessage);
+            }
+            else
+            {
+                return ValidationResult.ValidResult;
+            }
+        }
+    }
+}
diff --git a/LoggingClient/LoggingClient/Views/CustomerView.xaml b/LoggingClient/LoggingClient/Views/CustomerView.xaml
index 1fc9687..b09a57e 100644
--- a/LoggingClient/LoggingClient/Views/CustomerView.xaml
+++ b/LoggingClient/LoggingClient/Views/CustomerView.xaml
@@ -63,9 +63,8 @@
                 <TextBox.Text>
                     <Binding ElementName="DataGridCustomer" Path="SelectedItem.customernumber" UpdateSourceTrigger="PropertyChanged">
                         <Binding.ValidationRules>
-                            <validators:StringRangeValidationRule
-                                MinimumLength="1" MaximumLength="45"
-                                ErrorMessage="Message must contain at least 1 character up to 45" />
+                            <validators:CustomerNumberValidationRule
+                                ErrorMessage="CU12345 - Pattern of a valid CustomerNumber" />
                         </Binding.ValidationRules>
                     </Binding>
                 </TextBox.Text>
@@ -75,9 +74,8 @@
             <TextBox HorizontalAlignment="Left" Height="25" Margin="310,321,0,0" TextWrapping="Wrap" x:Name="EnterUrl" VerticalAlignment="Top" Width="95">
                 <Binding ElementName="DataGridCustomer" Path="SelectedItem.url" UpdateSourceTrigger="PropertyChanged">
                     <Binding.ValidationRules>
-                        <validators:StringRangeValidationRule
-                            MinimumLength="1" MaximumLength="30"
-                            ErrorMessage="Message must contain at least 1 characters up to 30" />
+                        <validators:UrlValidationRule
+                            ErrorMessage="Invalid URL." />
                     </Binding.ValidationRules>
                 </Binding>
             </TextBox>
@@ -111,9 +109,8 @@
             <TextBox HorizontalAlignment="Left" Height="25" Margin="210,372,0,0" TextWrapping="Wrap" x:Name="EnterEmail" VerticalAlignment="Top" Width="95">
                 <Binding ElementName="DataGridCustomer" Path="SelectedItem.email" UpdateSourceTrigger="PropertyChanged">
                     <Binding.ValidationRules>
-                        <validators:StringRangeValidationRule
-                            MinimumLength="1" MaximumLength="30"
-                            ErrorMessage="Message must contain at least 1 characters up to 30" />
+                        <validators:EmailValidationRule
+                            ErrorMessage="Invalid Email Address" />
                     </Binding.ValidationRules>
                 </Binding>
             </TextBox>
@@ -122,9 +119,8 @@
             <TextBox HorizontalAlignment="Left" Height="25" Margin="310,372,0,0" TextWrapping="Wrap" x:Name="EnterPassword" VerticalAlignment="Top" Width="95">
                 <Binding ElementName="DataGridCustomer" Path="SelectedItem.password" UpdateSourceTrigger="PropertyChanged">
                     <Binding.ValidationRules>
-                        <validators:StringRangeValidationRule
-                            MinimumLength="1" MaximumLength="255"
-                            ErrorMessage="Message must contain at least 1 character up to 255" />
+                        <validators:PasswordValidationRule
+                            ErrorMessage="1 lower, 1 UPPER-case, 1 number, 1 SpecialCaracter, 8-15 caracters" />
                     </Binding.ValidationRules>
                 </Binding>
             </TextBox>