diff --git a/NorthBridge/NorthBridgeContract/DataModels/BuyerDataModel.cs b/NorthBridge/NorthBridgeContract/DataModels/BuyerDataModel.cs
index 17b7afa..22b6755 100644
--- a/NorthBridge/NorthBridgeContract/DataModels/BuyerDataModel.cs
+++ b/NorthBridge/NorthBridgeContract/DataModels/BuyerDataModel.cs
@@ -5,7 +5,7 @@ using System.Text.RegularExpressions;
 
 namespace NorthBridgeContract.DataModels;
 
-public class BuyerDataModel(string id, string fio, string phoneNumber, double discountSize) : IValidation
+public class BuyerDataModel(string id, string fio, string phoneNumber) : IValidation
 {
 	public string Id { get; private set; } = id;
 
@@ -13,8 +13,6 @@ public class BuyerDataModel(string id, string fio, string phoneNumber, double di
 
 	public string PhoneNumber { get; private set; } = phoneNumber;
 
-	public double DiscountSize { get; private set; } = discountSize;
-
 	public void Validate()
 	{
 		if (Id.IsEmpty())
@@ -31,5 +29,8 @@ public class BuyerDataModel(string id, string fio, string phoneNumber, double di
 
 		if (!Regex.IsMatch(PhoneNumber, @"^((8|\+7)[\- ]?)?(\(?\d{3}\)?[\- ]?)?[\d\- ]{7,10}$"))
 			throw new ValidationException("Field PhoneNumber is not a phone number");
+
+		if (!Regex.IsMatch(FIO, @"^[А-ЯЁ][а-яё]+(?:-[А-ЯЁ][а-яё]+)?\s[А-ЯЁ][а-яё]+(?:\s[А-ЯЁ][а-яё]+)?$"))
+			throw new ValidationException("Field FIO is not a fio");
 	}
 }
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diff --git a/NorthBridge/NorthBridgeTest/DataModelsTests/BuyerDataModelTests.cs b/NorthBridge/NorthBridgeTest/DataModelsTests/BuyerDataModelTests.cs
index 6206dca..6773c50 100644
--- a/NorthBridge/NorthBridgeTest/DataModelsTests/BuyerDataModelTests.cs
+++ b/NorthBridge/NorthBridgeTest/DataModelsTests/BuyerDataModelTests.cs
@@ -9,41 +9,41 @@ internal class BuyerDataModelTests
 	[Test]
 	public void IdIsNullOrEmptyTest()
 	{
-		var buyer = CreateDataModel(null, "fio", "number", 10);
+		var buyer = CreateDataModel(null, "Иванов Иван Иванович", "number");
 		Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
-		buyer = CreateDataModel(string.Empty, "fio", "number", 10);
+		buyer = CreateDataModel(string.Empty, "Иванов Иван Иванович", "number");
 		Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
 	}
 
 	[Test]
 	public void IdIsNotGuidTest()
 	{
-		var buyer = CreateDataModel("id", "fio", "number", 10);
+		var buyer = CreateDataModel("id", "Иванов Иван Иванович", "number");
 		Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
 	}
 
 	[Test]
 	public void FIOIsNullOrEmptyTest()
 	{
-		var buyer = CreateDataModel(Guid.NewGuid().ToString(), null, "number", 10);
+		var buyer = CreateDataModel(Guid.NewGuid().ToString(), null, "number");
 		Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
-		buyer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "number", 10);
+		buyer = CreateDataModel(Guid.NewGuid().ToString(), string.Empty, "number");
 		Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
 	}
 
 	[Test]
 	public void PhoneNumberIsNullOrEmptyTest()
 	{
-		var buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", null, 10);
+		var buyer = CreateDataModel(Guid.NewGuid().ToString(), "Иванов Иван Иванович", null);
 		Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
-		buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", string.Empty, 10);
+		buyer = CreateDataModel(Guid.NewGuid().ToString(), "Иванов Иван Иванович", string.Empty);
 		Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
 	}
 
 	[Test]
 	public void PhoneNumberIsIncorrectTest()
 	{
-		var buyer = CreateDataModel(Guid.NewGuid().ToString(), "fio", "777", 10);
+		var buyer = CreateDataModel(Guid.NewGuid().ToString(), "Иванов Иван Иванович", "777");
 		Assert.That(() => buyer.Validate(), Throws.TypeOf<ValidationException>());
 	}
 
@@ -51,21 +51,19 @@ internal class BuyerDataModelTests
 	public void AllFieldsIsCorrectTest()
 	{
 		var buyerId = Guid.NewGuid().ToString();
-		var fio = "Fio";
+		var fio = "Иванов Иван Иванович";
 		var phoneNumber = "+7-777-777-77-77";
-		var discountSize = 11;
-		var buyer = CreateDataModel(buyerId, fio, phoneNumber, discountSize);
+		var buyer = CreateDataModel(buyerId, fio, phoneNumber);
 		Assert.That(() => buyer.Validate(), Throws.Nothing);
 		Assert.Multiple(() =>
 		{
 			Assert.That(buyer.Id, Is.EqualTo(buyerId));
 			Assert.That(buyer.FIO, Is.EqualTo(fio));
 			Assert.That(buyer.PhoneNumber, Is.EqualTo(phoneNumber));
-			Assert.That(buyer.DiscountSize, Is.EqualTo(discountSize));
 		});
 	}
 
-	private static BuyerDataModel CreateDataModel(string? id, string? fio, string? phoneNumber, double discountSize) =>
-		new(id, fio, phoneNumber, discountSize);
+	private static BuyerDataModel CreateDataModel(string? id, string? fio, string? phoneNumber) =>
+		new(id, fio, phoneNumber);
 
 }
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