diff --git a/src/Services/Flight/src/Flight/Aircrafts/Features/CreatingAircraft/V1/CreateAircraft.cs b/src/Services/Flight/src/Flight/Aircrafts/Features/CreatingAircraft/V1/CreateAircraft.cs
index 338a638..0345498 100644
--- a/src/Services/Flight/src/Flight/Aircrafts/Features/CreatingAircraft/V1/CreateAircraft.cs
+++ b/src/Services/Flight/src/Flight/Aircrafts/Features/CreatingAircraft/V1/CreateAircraft.cs
@@ -7,10 +7,9 @@ using Ardalis.GuardClauses;
 using BuildingBlocks.Core.CQRS;
 using BuildingBlocks.Core.Event;
 using BuildingBlocks.Web;
-using Exceptions;
-using Models;
 using Data;
 using Duende.IdentityServer.EntityFramework.Entities;
+using Exceptions;
 using FluentValidation;
 using MapsterMapper;
 using MassTransit;
@@ -19,6 +18,8 @@ using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Routing;
 using Microsoft.EntityFrameworkCore;
+using Models;
+using Models.ValueObjects;
 
 public record CreateAircraft(string Name, string Model, int ManufacturingYear) : ICommand<CreateAircraftResult>,
     IInternalCommand
@@ -96,7 +97,7 @@ internal class CreateAircraftHandler : IRequestHandler<CreateAircraft, CreateAir
             throw new AircraftAlreadyExistException();
         }
 
-        var aircraftEntity = Aircraft.Create(request.Id, request.Name, request.Model, request.ManufacturingYear);
+        var aircraftEntity = Aircraft.Create(request.Id, NameValue.Of(request.Name), ModelValue.Of(request.Model), ManufacturingYearValue.Of(request.ManufacturingYear));
 
         var newAircraft = (await _flightDbContext.Aircraft.AddAsync(aircraftEntity, cancellationToken))?.Entity;
 
diff --git a/src/Services/Flight/src/Flight/Aircrafts/Models/Aircraft.cs b/src/Services/Flight/src/Flight/Aircrafts/Models/Aircraft.cs
index 6ac88dd..0615cf4 100644
--- a/src/Services/Flight/src/Flight/Aircrafts/Models/Aircraft.cs
+++ b/src/Services/Flight/src/Flight/Aircrafts/Models/Aircraft.cs
@@ -4,14 +4,15 @@ namespace Flight.Aircrafts.Models;
 
 using System;
 using Features.CreatingAircraft.V1;
+using ValueObjects;
 
 public record Aircraft : Aggregate<Guid>
 {
-    public string Name { get; private set; }
-    public string Model { get; private set; }
-    public int ManufacturingYear { get; private set; }
+    public NameValue Name { get; private set; }
+    public ModelValue Model { get; private set; }
+    public ManufacturingYearValue ManufacturingYear { get; private set; }
 
-    public static Aircraft Create(Guid id, string name, string model, int manufacturingYear, bool isDeleted = false)
+    public static Aircraft Create(Guid id, NameValue name, ModelValue model, ManufacturingYearValue manufacturingYear, bool isDeleted = false)
     {
         var aircraft = new Aircraft
         {
diff --git a/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/ManufacturingYearValue.cs b/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/ManufacturingYearValue.cs
new file mode 100644
index 0000000..5d67e9c
--- /dev/null
+++ b/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/ManufacturingYearValue.cs
@@ -0,0 +1,18 @@
+namespace Flight.Aircrafts.Models.ValueObjects;
+using System;
+
+public record ManufacturingYearValue : GenericValueObject<int>
+{
+    public ManufacturingYearValue(int value) : base(value)
+    {
+        if (value < 1900 || value > DateTime.Now.Year)
+        {
+            throw new ArgumentException("Manufacturing year is invalid.");
+        }
+    }
+
+    public static ManufacturingYearValue Of(int value)
+    {
+        return new ManufacturingYearValue(value);
+    }
+}
diff --git a/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/ModelValue.cs b/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/ModelValue.cs
new file mode 100644
index 0000000..4284baa
--- /dev/null
+++ b/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/ModelValue.cs
@@ -0,0 +1,17 @@
+namespace Flight.Aircrafts.Models.ValueObjects;
+using System;
+public record ModelValue : GenericValueObject<string>
+{
+    public ModelValue(string value) : base(value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            throw new ArgumentException("Model cannot be empty or whitespace.");
+        }
+    }
+
+    public static ModelValue Of(string value)
+    {
+        return new ModelValue(value);
+    }
+}
diff --git a/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/NameValue.cs b/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/NameValue.cs
new file mode 100644
index 0000000..9ef89b7
--- /dev/null
+++ b/src/Services/Flight/src/Flight/Aircrafts/Models/ValueObjects/NameValue.cs
@@ -0,0 +1,18 @@
+namespace Flight.Aircrafts.Models.ValueObjects;
+using System;
+
+public record NameValue : GenericValueObject<string>
+{
+    public NameValue(string value) : base(value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            throw new ArgumentException("Name cannot be empty or whitespace.");
+        }
+    }
+
+    public static NameValue Of(string value)
+    {
+        return new NameValue(value);
+    }
+}
diff --git a/src/Services/Flight/src/Flight/Data/Seed/InitialData.cs b/src/Services/Flight/src/Flight/Data/Seed/InitialData.cs
index 2953dd7..3fe9c95 100644
--- a/src/Services/Flight/src/Flight/Data/Seed/InitialData.cs
+++ b/src/Services/Flight/src/Flight/Data/Seed/InitialData.cs
@@ -1,9 +1,10 @@
-namespace Flight.Data.Seed;
+namespace Flight.Data.Seed;
 
 using System;
 using System.Collections.Generic;
 using System.Linq;
 using Aircrafts.Models;
+using Aircrafts.Models.ValueObjects;
 using Airports.Models;
 using Flights.Models;
 using MassTransit;
@@ -11,9 +12,9 @@ using Seats.Models;
 
 public static class InitialData
 {
-    public static List<Airport> Airports { get;}
-    public static List<Aircraft> Aircrafts { get;}
-    public static List<Seat> Seats { get;}
+    public static List<Airport> Airports { get; }
+    public static List<Aircraft> Aircrafts { get; }
+    public static List<Seat> Seats { get; }
     public static List<Flight> Flights { get; }
 
 
@@ -27,9 +28,9 @@ public static class InitialData
 
         Aircrafts = new List<Aircraft>
         {
-            Aircraft.Create(new Guid("3c5c0000-97c6-fc34-fcd3-08db322230c8"), "Boeing 737", "B737", 2005),
-            Aircraft.Create(new Guid("3c5c0000-97c6-fc34-2e04-08db322230c9"), "Airbus 300", "A300", 2000),
-            Aircraft.Create(new Guid("3c5c0000-97c6-fc34-2e11-08db322230c9"), "Airbus 320", "A320", 2003)
+            Aircraft.Create(new Guid("3c5c0000-97c6-fc34-fcd3-08db322230c8"), NameValue.Of("Boeing 737"), ModelValue.Of("B737"), ManufacturingYearValue.Of(2005)),
+            Aircraft.Create(new Guid("3c5c0000-97c6-fc34-2e04-08db322230c9"), NameValue.Of("Airbus 300"), ModelValue.Of("A300"), ManufacturingYearValue.Of(2000)),
+            Aircraft.Create(new Guid("3c5c0000-97c6-fc34-2e11-08db322230c9"), NameValue.Of("Airbus 320"), ModelValue.Of("A320"), ManufacturingYearValue.Of(2003))
         };
 
 
diff --git a/src/Services/Flight/src/Flight/GenericValueObject.cs b/src/Services/Flight/src/Flight/GenericValueObject.cs
new file mode 100644
index 0000000..9088ed7
--- /dev/null
+++ b/src/Services/Flight/src/Flight/GenericValueObject.cs
@@ -0,0 +1,13 @@
+namespace Flight;
+public record GenericValueObject<T>(T Value)
+{
+    public override string ToString()
+    {
+        return Value.ToString();
+    }
+
+    public static implicit operator T(GenericValueObject<T> valueObject)
+    {
+        return valueObject.Value;
+    }
+}
diff --git a/src/Services/Flight/tests/UnitTest/Common/DbContextFactory.cs b/src/Services/Flight/tests/UnitTest/Common/DbContextFactory.cs
index 97fccd7..d8cc94b 100644
--- a/src/Services/Flight/tests/UnitTest/Common/DbContextFactory.cs
+++ b/src/Services/Flight/tests/UnitTest/Common/DbContextFactory.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using Flight.Data;
 using Flight.Flights.Enums;
@@ -7,6 +7,7 @@ using Microsoft.EntityFrameworkCore;
 
 namespace Unit.Test.Common;
 
+using global::Flight.Aircrafts.Models.ValueObjects;
 using MassTransit;
 
 public static class DbContextFactory
@@ -45,9 +46,9 @@ public static class DbContextFactory
 
         var aircrafts = new List<global::Flight.Aircrafts.Models.Aircraft>
         {
-            global::Flight.Aircrafts.Models.Aircraft.Create(_aircraft1, "Boeing 737", "B737", 2005),
-            global::Flight.Aircrafts.Models.Aircraft.Create(_aircraft2, "Airbus 300", "A300", 2000),
-            global::Flight.Aircrafts.Models.Aircraft.Create(_aircraft3, "Airbus 320", "A320", 2003)
+            global::Flight.Aircrafts.Models.Aircraft.Create(_aircraft1, NameValue.Of("Boeing 737"), ModelValue.Of("B737"), ManufacturingYearValue.Of(2005)),
+            global::Flight.Aircrafts.Models.Aircraft.Create(_aircraft2, NameValue.Of("Airbus 300"), ModelValue.Of("A300"), ManufacturingYearValue.Of(2000)),
+            global::Flight.Aircrafts.Models.Aircraft.Create(_aircraft3, NameValue.Of("Airbus 320"), ModelValue.Of("A320"), ManufacturingYearValue.Of(2003))
         };
 
         context.Aircraft.AddRange(aircrafts);
diff --git a/src/Services/Passenger/src/Passenger/Identity/Consumers/RegisteringNewUser/V1/RegisterNewUser.cs b/src/Services/Passenger/src/Passenger/Identity/Consumers/RegisteringNewUser/V1/RegisterNewUser.cs
index 27456a8..cae62d6 100644
--- a/src/Services/Passenger/src/Passenger/Identity/Consumers/RegisteringNewUser/V1/RegisterNewUser.cs
+++ b/src/Services/Passenger/src/Passenger/Identity/Consumers/RegisteringNewUser/V1/RegisterNewUser.cs
@@ -5,12 +5,13 @@ using BuildingBlocks.Contracts.EventBus.Messages;
 using BuildingBlocks.Core;
 using BuildingBlocks.Core.Event;
 using BuildingBlocks.Web;
+using Data;
 using Humanizer;
 using MassTransit;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
-using Data;
+using Passenger.Passengers.Models.ValueObjects;
 
 public class RegisterNewUserHandler : IConsumer<UserCreated>
 {
@@ -44,8 +45,8 @@ public class RegisterNewUserHandler : IConsumer<UserCreated>
             return;
         }
 
-        var passenger = Passengers.Models.Passenger.Create(NewId.NextGuid(), context.Message.Name,
-            context.Message.PassportNumber);
+        var passenger = Passengers.Models.Passenger.Create(NewId.NextGuid(), NameValue.Of(context.Message.Name),
+            PassportNumberValue.Of(context.Message.PassportNumber));
 
         await _passengerDbContext.AddAsync(passenger);
 
diff --git a/src/Services/Passenger/src/Passenger/Passengers/Features/CompletingRegisterPassenger/V1/CompleteRegisterPassenger.cs b/src/Services/Passenger/src/Passenger/Passengers/Features/CompletingRegisterPassenger/V1/CompleteRegisterPassenger.cs
index d6bdf12..5681936 100644
--- a/src/Services/Passenger/src/Passenger/Passengers/Features/CompletingRegisterPassenger/V1/CompleteRegisterPassenger.cs
+++ b/src/Services/Passenger/src/Passenger/Passengers/Features/CompletingRegisterPassenger/V1/CompleteRegisterPassenger.cs
@@ -4,18 +4,19 @@ using Ardalis.GuardClauses;
 using BuildingBlocks.Core.CQRS;
 using BuildingBlocks.Core.Event;
 using BuildingBlocks.Web;
-using Exceptions;
-using FluentValidation;
-using MapsterMapper;
-using Microsoft.EntityFrameworkCore;
 using Data;
 using Dtos;
 using Duende.IdentityServer.EntityFramework.Entities;
+using Exceptions;
+using FluentValidation;
+using MapsterMapper;
 using MassTransit;
 using MediatR;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Routing;
+using Microsoft.EntityFrameworkCore;
+using Passenger.Passengers.Models.ValueObjects;
 
 public record CompleteRegisterPassenger
     (string PassportNumber, Enums.PassengerType PassengerType, int Age) : ICommand<CompleteRegisterPassengerResult>,
@@ -104,7 +105,7 @@ internal class CompleteRegisterPassengerCommandHandler : ICommandHandler<Complet
         }
 
         var passengerEntity = passenger.CompleteRegistrationPassenger(passenger.Id, passenger.Name,
-            passenger.PassportNumber, request.PassengerType, request.Age);
+            passenger.PassportNumber, request.PassengerType, AgeValue.Of(request.Age));
 
         var updatePassenger = _passengerDbContext.Passengers.Update(passengerEntity);
 
diff --git a/src/Services/Passenger/src/Passenger/Passengers/Models/Passenger.cs b/src/Services/Passenger/src/Passenger/Passengers/Models/Passenger.cs
index 638218e..d1dd8fc 100644
--- a/src/Services/Passenger/src/Passenger/Passengers/Models/Passenger.cs
+++ b/src/Services/Passenger/src/Passenger/Passengers/Models/Passenger.cs
@@ -3,24 +3,25 @@ using BuildingBlocks.Core.Model;
 namespace Passenger.Passengers.Models;
 
 using Features.CompletingRegisterPassenger.V1;
+using global::Passenger.Passengers.Models.ValueObjects;
 using Identity.Consumers.RegisteringNewUser.V1;
 
 public record Passenger : Aggregate<Guid>
 {
-    public Passenger CompleteRegistrationPassenger(Guid id, string name, string passportNumber, Enums.PassengerType passengerType, int age, bool isDeleted = false)
+    public Passenger CompleteRegistrationPassenger(Guid id, NameValue name, PassportNumberValue passportNumber, Enums.PassengerType passengerType, AgeValue age, bool isDeleted = false)
     {
         var passenger = new Passenger
         {
+            Id = id,
             Name = name,
             PassportNumber = passportNumber,
             PassengerType = passengerType,
             Age = age,
-            Id = id,
             IsDeleted = isDeleted
         };
 
         var @event = new PassengerRegistrationCompletedDomainEvent(passenger.Id, passenger.Name, passenger.PassportNumber,
-            passenger.PassengerType, passenger.Age, passenger.IsDeleted);
+            passenger.PassengerType, passenger.Age.Value, passenger.IsDeleted);
 
         passenger.AddDomainEvent(@event);
 
@@ -28,7 +29,7 @@ public record Passenger : Aggregate<Guid>
     }
 
 
-    public static Passenger Create(Guid id, string name, string passportNumber, bool isDeleted = false)
+    public static Passenger Create(Guid id, NameValue name, PassportNumberValue passportNumber, bool isDeleted = false)
     {
         var passenger = new Passenger { Id = id, Name = name, PassportNumber = passportNumber, IsDeleted = isDeleted };
 
@@ -40,8 +41,8 @@ public record Passenger : Aggregate<Guid>
     }
 
 
-    public string PassportNumber { get; private set; }
-    public string Name { get; private set; }
+    public PassportNumberValue PassportNumber { get; private set; }
+    public NameValue Name { get; private set; }
     public Enums.PassengerType PassengerType { get; private set; }
-    public int Age { get; private set; }
+    public AgeValue Age { get; private set; }
 }
diff --git a/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/AgeValue.cs b/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/AgeValue.cs
new file mode 100644
index 0000000..5354395
--- /dev/null
+++ b/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/AgeValue.cs
@@ -0,0 +1,18 @@
+namespace Passenger.Passengers.Models.ValueObjects;
+using System;
+
+public record AgeValue : GenericValueObject<int>
+{
+    public AgeValue(int value) : base(value)
+    {
+        if (value < 0)
+        {
+            throw new ArgumentException("Age cannot be negative.");
+        }
+        Value = value;
+    }
+    public static AgeValue Of(int value)
+    {
+        return new AgeValue(value);
+    }
+}
diff --git a/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/GenericValueObject.cs b/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/GenericValueObject.cs
new file mode 100644
index 0000000..ee0353a
--- /dev/null
+++ b/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/GenericValueObject.cs
@@ -0,0 +1,13 @@
+namespace Passenger.Passengers.Models.ValueObjects;
+public record GenericValueObject<T>(T Value)
+{
+    public override string ToString()
+    {
+        return Value.ToString();
+    }
+
+    public static implicit operator T(GenericValueObject<T> valueObject)
+    {
+        return valueObject.Value;
+    }
+}
diff --git a/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/NameValue.cs b/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/NameValue.cs
new file mode 100644
index 0000000..b34b381
--- /dev/null
+++ b/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/NameValue.cs
@@ -0,0 +1,18 @@
+namespace Passenger.Passengers.Models.ValueObjects;
+using System;
+
+public record NameValue : GenericValueObject<string>
+{
+    public NameValue(string value) : base(value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            throw new ArgumentException("Name cannot be empty or whitespace.");
+        }
+        Value = value;
+    }
+    public static NameValue Of(string value)
+    {
+        return new NameValue(value);
+    }
+}
diff --git a/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/PassportNumberValue.cs b/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/PassportNumberValue.cs
new file mode 100644
index 0000000..436f388
--- /dev/null
+++ b/src/Services/Passenger/src/Passenger/Passengers/Models/ValueObjects/PassportNumberValue.cs
@@ -0,0 +1,19 @@
+namespace Passenger.Passengers.Models.ValueObjects;
+using System;
+
+
+public record PassportNumberValue : GenericValueObject<string>
+{
+    public PassportNumberValue(string value) : base(value)
+    {
+        if (string.IsNullOrWhiteSpace(value))
+        {
+            throw new ArgumentException("Passport number cannot be empty or whitespace.");
+        }
+        Value = value;
+    }
+    public static PassportNumberValue Of(string value)
+    {
+        return new PassportNumberValue(value);
+    }
+}