diff --git a/API_SQLuedo/Model/BlackList.cs b/API_SQLuedo/Model/BlackList.cs
index 002b5ba..bce0cf0 100644
--- a/API_SQLuedo/Model/BlackList.cs
+++ b/API_SQLuedo/Model/BlackList.cs
@@ -7,6 +7,9 @@ public class BlackList
 
     public BlackList(string email, DateOnly expirationDate)
     {
+        if (email is null or "")
+            throw new ArgumentException("Email cannot be null or empty");
+        ArgumentOutOfRangeException.ThrowIfLessThan(expirationDate, DateOnly.FromDateTime(DateTime.Now));
         Email = email;
         ExpirationDate = expirationDate;
     }
diff --git a/API_SQLuedo/TestEF/EntitiesTests/TestBlackListEntity.cs b/API_SQLuedo/TestEF/EntitiesTests/TestBlackListEntity.cs
new file mode 100644
index 0000000..abc2ad6
--- /dev/null
+++ b/API_SQLuedo/TestEF/EntitiesTests/TestBlackListEntity.cs
@@ -0,0 +1,54 @@
+using Model;
+
+namespace TestEF.EntitiesTests;
+
+public class TestBlackListEntity
+{
+    [Fact]
+    public void Constructor_ShouldSetProperties_WhenCalledWithTwoParameters()
+    {
+        // Arrange
+        string email = "test@example.com";
+        DateOnly expirationDate = DateOnly.FromDateTime(DateTime.Now.AddDays(10));
+
+        // Act
+        var blackList = new BlackList(email, expirationDate);
+
+        // Assert
+        Assert.Equal(email, blackList.Email);
+        Assert.Equal(expirationDate, blackList.ExpirationDate);
+    }
+
+    [Fact]
+    public void Constructor_ShouldThrowArgumentException_WhenEmailIsEmpty()
+    {
+        // Arrange
+        string email = string.Empty;
+        DateOnly expirationDate = DateOnly.FromDateTime(DateTime.Now.AddDays(10));
+
+        // Act & Assert
+        Assert.Throws<ArgumentException>(() => new BlackList(email, expirationDate));
+    }
+
+    [Fact]
+    public void Constructor_ShouldThrowArgumentException_WhenEmailIsNull()
+    {
+        // Arrange
+        string email = null;
+        DateOnly expirationDate = DateOnly.FromDateTime(DateTime.Now.AddDays(10));
+
+        // Act & Assert
+        Assert.Throws<ArgumentException>(() => new BlackList(email, expirationDate));
+    }
+
+    [Fact]
+    public void Constructor_ShouldThrowArgumentOutOfRangeException_WhenExpirationDateIsInThePast()
+    {
+        // Arrange
+        string email = "test@example.com";
+        DateOnly expirationDate = DateOnly.FromDateTime(DateTime.Now.AddDays(-1));
+
+        // Act & Assert
+        Assert.Throws<ArgumentOutOfRangeException>(() => new BlackList(email, expirationDate));
+    }
+}
\ No newline at end of file