diff --git a/Retroactiune.UnitTests/Retroactiune.WebAPI/Services/TestFeedbackReceiverService.cs b/Retroactiune.UnitTests/Retroactiune.WebAPI/Services/TestFeedbackReceiverService.cs
index 8cc8643..818b4cb 100644
--- a/Retroactiune.UnitTests/Retroactiune.WebAPI/Services/TestFeedbackReceiverService.cs
+++ b/Retroactiune.UnitTests/Retroactiune.WebAPI/Services/TestFeedbackReceiverService.cs
@@ -1,6 +1,126 @@
-namespace Retroactiune.Tests.Retroactiune.WebAPI.Services
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+using AutoFixture.Xunit2;
+using MongoDB.Driver;
+using Moq;
+using Retroactiune.Models;
+using Retroactiune.Services;
+using Retroactiune.Settings;
+using Xunit;
+
+namespace Retroactiune.Tests.Retroactiune.WebAPI.Services
 {
     public class TestFeedbackReceiverService
     {
+        [Theory, AutoData]
+        public async Task Test_CreateManyAsync_Success(IEnumerable<FeedbackReceiver> items)
+        {
+            // Arrange
+            var mongoDatabaseMock = new Mock<IMongoDatabase>();
+            var mongoClientMock = new Mock<IMongoClient>();
+            var mongoSettingsMock = new Mock<IMongoDbSettings>();
+            var mongoCollectionMock = new Mock<IMongoCollection<FeedbackReceiver>>();
+
+            mongoSettingsMock.SetupGet(i => i.DatabaseName).Returns("MyDB");
+            mongoSettingsMock.SetupGet(i => i.FeedbackReceiverCollectionName).Returns("feedback_receiver");
+
+            mongoClientMock
+                .Setup(stub => stub.GetDatabase(It.IsAny<string>(), It.IsAny<MongoDatabaseSettings>()))
+                .Returns(mongoDatabaseMock.Object);
+
+            mongoDatabaseMock
+                .Setup(i => i.GetCollection<FeedbackReceiver>(It.IsAny<string>(), It.IsAny<MongoCollectionSettings>()))
+                .Returns(mongoCollectionMock.Object);
+
+            // Test
+            var service = new FeedbackReceiverService(mongoClientMock.Object, mongoSettingsMock.Object);
+            await service.CreateManyAsync(items);
+
+            // Assert
+            mongoClientMock.Verify(i => i.GetDatabase("MyDB", null), Times.Once());
+            mongoDatabaseMock.Verify(
+                i => i.GetCollection<FeedbackReceiver>("feedback_receiver", It.IsAny<MongoCollectionSettings>()),
+                Times.Once());
+            mongoCollectionMock.Verify(
+                i => i.InsertManyAsync(items, It.IsAny<InsertManyOptions>(), It.IsAny<CancellationToken>()),
+                Times.Once());
+        }
+
+        [Fact]
+        public void Test_CreateManyAsync_NullVal()
+        {
+            // Arrange
+            var mongoDatabaseMock = new Mock<IMongoDatabase>();
+            var mongoClientMock = new Mock<IMongoClient>();
+            var mongoSettingsMock = new Mock<IMongoDbSettings>();
+            var mongoCollectionMock = new Mock<IMongoCollection<FeedbackReceiver>>();
+
+            mongoSettingsMock.SetupGet(i => i.DatabaseName).Returns("MyDB");
+            mongoSettingsMock.SetupGet(i => i.FeedbackReceiverCollectionName).Returns("feedback_receiver");
+
+            mongoClientMock
+                .Setup(i => i.GetDatabase(It.IsAny<string>(), It.IsAny<MongoDatabaseSettings>()))
+                .Returns(mongoDatabaseMock.Object);
+
+            mongoDatabaseMock
+                .Setup(i => i.GetCollection<FeedbackReceiver>(It.IsAny<string>(), It.IsAny<MongoCollectionSettings>()))
+                .Returns(mongoCollectionMock.Object);
+
+            // Test
+            var service = new FeedbackReceiverService(mongoClientMock.Object, mongoSettingsMock.Object);
+            var ex = Record.ExceptionAsync(async () => await service.CreateManyAsync(null));
+
+
+            // Assert
+            Assert.NotNull(ex);
+
+            mongoClientMock
+                .Verify(i => i.GetDatabase("MyDB", null), Times.Once());
+            mongoDatabaseMock
+                .Verify(i => i.GetCollection<FeedbackReceiver>("feedback_receiver", It.IsAny<MongoCollectionSettings>()),
+                Times.Once());
+            mongoCollectionMock
+                .Verify(i => i.InsertManyAsync(It.IsAny<IEnumerable<FeedbackReceiver>>(), It.IsAny<InsertManyOptions>(), It.IsAny<CancellationToken>()),
+                Times.Never());
+        }
+        
+        [Fact]
+        public void Test_CreateManyAsync_NoItems()
+        {
+            // Arrange
+            var mongoDatabaseMock = new Mock<IMongoDatabase>();
+            var mongoClientMock = new Mock<IMongoClient>();
+            var mongoSettingsMock = new Mock<IMongoDbSettings>();
+            var mongoCollectionMock = new Mock<IMongoCollection<FeedbackReceiver>>();
+
+            mongoSettingsMock.SetupGet(i => i.DatabaseName).Returns("MyDB");
+            mongoSettingsMock.SetupGet(i => i.FeedbackReceiverCollectionName).Returns("feedback_receiver");
+
+            mongoClientMock
+                .Setup(i => i.GetDatabase(It.IsAny<string>(), It.IsAny<MongoDatabaseSettings>()))
+                .Returns(mongoDatabaseMock.Object);
+
+            mongoDatabaseMock
+                .Setup(i => i.GetCollection<FeedbackReceiver>(It.IsAny<string>(), It.IsAny<MongoCollectionSettings>()))
+                .Returns(mongoCollectionMock.Object);
+
+            // Test
+            var service = new FeedbackReceiverService(mongoClientMock.Object, mongoSettingsMock.Object);
+            var ex = Record.ExceptionAsync(async () => await service.CreateManyAsync(new List<FeedbackReceiver>()));
+
+
+            // Assert
+            Assert.NotNull(ex);
+
+            mongoClientMock
+                .Verify(i => i.GetDatabase("MyDB", null), Times.Once());
+            mongoDatabaseMock
+                .Verify(i => i.GetCollection<FeedbackReceiver>("feedback_receiver", It.IsAny<MongoCollectionSettings>()),
+                    Times.Once());
+            mongoCollectionMock
+                .Verify(i => i.InsertManyAsync(It.IsAny<IEnumerable<FeedbackReceiver>>(), It.IsAny<InsertManyOptions>(), It.IsAny<CancellationToken>()),
+                    Times.Never());
+        }
     }
 }
\ No newline at end of file
diff --git a/Retroactiune.WebAPI/Services/FeedbackReceiverService.cs b/Retroactiune.WebAPI/Services/FeedbackReceiverService.cs
index 28e9b1e..3337c0f 100644
--- a/Retroactiune.WebAPI/Services/FeedbackReceiverService.cs
+++ b/Retroactiune.WebAPI/Services/FeedbackReceiverService.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
 using MongoDB.Driver;
 using Retroactiune.Models;
@@ -23,6 +24,16 @@ namespace Retroactiune.Services
 
         public async Task CreateManyAsync(IEnumerable<FeedbackReceiver> items)
         {
+            if (items == null)
+            {
+                throw new ArgumentNullException(nameof(items));
+            }
+
+            if (!items.Any())
+            {
+                throw new GenericServiceException("items must contain at least one element");
+            }
+            
             try
             {
                 await _collection.InsertManyAsync(items);
diff --git a/Retroactiune.WebAPI/Settings/IMongoDbSettings.cs b/Retroactiune.WebAPI/Settings/IMongoDbSettings.cs
index 101bb42..512854f 100644
--- a/Retroactiune.WebAPI/Settings/IMongoDbSettings.cs
+++ b/Retroactiune.WebAPI/Settings/IMongoDbSettings.cs
@@ -1,6 +1,4 @@
-using System;
-
-namespace Retroactiune.Settings
+namespace Retroactiune.Settings
 {
     /// <summary>
     /// Interface for repressing the application's MongoDb settings Options.