diff --git a/ShareBook/ShareBook.Api/appsettings.Development.json b/ShareBook/ShareBook.Api/appsettings.Development.json
index 917d98ed..7fec51e2 100644
--- a/ShareBook/ShareBook.Api/appsettings.Development.json
+++ b/ShareBook/ShareBook.Api/appsettings.Development.json
@@ -33,5 +33,9 @@
   "NotificationSettings": {
     "AppId": "6a87a746-9a45-4ecf-a869-911d3b3a75b9",
     "ApiKey": "YTUyYzU1MTctZjExNS00MTQ5LTliZTgtMGExNmM4ZWRiNjkw"
+  },
+  "Muambator": {
+      "Token": "",
+      "IsActive": "false"
   }
 }
diff --git a/ShareBook/ShareBook.Api/appsettings.Stage.json b/ShareBook/ShareBook.Api/appsettings.Stage.json
index 6eec6fb6..165713c6 100644
--- a/ShareBook/ShareBook.Api/appsettings.Stage.json
+++ b/ShareBook/ShareBook.Api/appsettings.Stage.json
@@ -29,5 +29,9 @@
   "NotificationSettings": {
     "AppId": "6a87a746-9a45-4ecf-a869-911d3b3a75b9",
     "ApiKey": "YTUyYzU1MTctZjExNS00MTQ5LTliZTgtMGExNmM4ZWRiNjkw"
+  },
+  "Muambator": {
+      "Token": "",
+      "IsActive": "false"
   }
 }
diff --git a/ShareBook/ShareBook.Api/appsettings.json b/ShareBook/ShareBook.Api/appsettings.json
index 3a309ab0..52514631 100644
--- a/ShareBook/ShareBook.Api/appsettings.json
+++ b/ShareBook/ShareBook.Api/appsettings.json
@@ -20,9 +20,5 @@
       }
     }
   },
-  "RollbarEnvironment": "local",
-  "Muambator": {
-    "Token": "",
-    "IsActive":  "true"
-  }
+  "RollbarEnvironment": "local"
 }
diff --git a/ShareBook/ShareBook.Service/BookUser/BookUserService.cs b/ShareBook/ShareBook.Service/BookUser/BookUserService.cs
index 6cfaf7ea..c254818f 100644
--- a/ShareBook/ShareBook.Service/BookUser/BookUserService.cs
+++ b/ShareBook/ShareBook.Service/BookUser/BookUserService.cs
@@ -22,12 +22,14 @@ public class BookUserService : BaseService<BookUser>, IBookUserService
         private readonly IBookService _bookService;
         private readonly IBookUsersEmailService _bookUsersEmailService;
         private readonly IMuambatorService _muambatorService;
+        private readonly IBookRepository _bookRepository;
 
         public BookUserService(
             IBookUserRepository bookUserRepository, 
             IBookService bookService,
             IBookUsersEmailService bookUsersEmailService,
             IMuambatorService muambatorService,
+            IBookRepository bookRepository,
             IUnitOfWork unitOfWork,
             IValidator<BookUser> validator)
             : base(bookUserRepository, unitOfWork, validator)
@@ -36,6 +38,7 @@ public BookUserService(
             _bookService = bookService;
             _bookUsersEmailService = bookUsersEmailService;
             _muambatorService = muambatorService;
+            _bookRepository = bookRepository;
         }
 
         public IList<User> GetGranteeUsersByBookId(Guid bookId) =>
@@ -204,7 +207,10 @@ public void NotifyUsersBookCanceled(Book book){
 
         public void InformTrackingNumber(Guid bookId, string trackingNumber)
         {
-            var book = _bookService.Find(bookId);
+            var book = _bookRepository.Get()
+                                      .Include(d => d.User)
+                                      .Include(f => f.UserFacilitator)
+                                      .FirstOrDefault(id => id.Id == bookId);
             var winnerBookUser = _bookUserRepository
                                         .Get()
                                         .Include(u => u.User)
@@ -215,7 +221,10 @@ public void InformTrackingNumber(Guid bookId, string trackingNumber)
                 throw new ShareBookException("Vencedor ainda não foi escolhido");
 
             if(MuambatorConfigurator.IsActive)
-                _muambatorService.AddPackageToTrackerAsync(winnerBookUser.User.Email, trackingNumber);
+                _muambatorService.AddPackageToTrackerAsync(winnerBookUser.User.Email, 
+                                                           book.UserFacilitator == null ? string.Empty : book.UserFacilitator.Email, 
+                                                           book.User == null ? string.Empty : book.User.Email, 
+                                                           trackingNumber);
 
             book.TrackingNumber = trackingNumber; 
             _bookService.Update(book);
diff --git a/ShareBook/ShareBook.Service/Muambator/IMuambatorService.cs b/ShareBook/ShareBook.Service/Muambator/IMuambatorService.cs
index 2e5b3549..4402379c 100644
--- a/ShareBook/ShareBook.Service/Muambator/IMuambatorService.cs
+++ b/ShareBook/ShareBook.Service/Muambator/IMuambatorService.cs
@@ -4,7 +4,7 @@ namespace ShareBook.Service.Muambator
 {
     public interface IMuambatorService
     {
-        Task<MuambatorDTO> AddPackageToTrackerAsync(string emailReceiver, string packageNumber);
+        Task<MuambatorDTO> AddPackageToTrackerAsync(string emailReceiver, string emailFacilitator, string emailDonor, string packageNumber);
 
         Task<MuambatorDTO> RemovePackageToTrackerAsync(string packageNumber);
     }
diff --git a/ShareBook/ShareBook.Service/Muambator/MuambatorService.cs b/ShareBook/ShareBook.Service/Muambator/MuambatorService.cs
index 20fdb97c..d243e546 100644
--- a/ShareBook/ShareBook.Service/Muambator/MuambatorService.cs
+++ b/ShareBook/ShareBook.Service/Muambator/MuambatorService.cs
@@ -6,7 +6,8 @@ namespace ShareBook.Service.Muambator
 {
     public class MuambatorService : IMuambatorService
     {
-        public async Task<MuambatorDTO> AddPackageToTrackerAsync(string emailReceiver, string packageNumber)
+        public async Task<MuambatorDTO> AddPackageToTrackerAsync(string emailReceiver, string emailFacilitator, 
+                                                                 string emailDonor, string packageNumber)
         {
             var url = $"https://www.muambator.com.br/api/clientes/v1/pacotes/{packageNumber}/?api-token={MuambatorConfigurator.Token}";
 
@@ -14,7 +15,7 @@ public async Task<MuambatorDTO> AddPackageToTrackerAsync(string emailReceiver, s
 
             try
             {
-                result = await url.WithHeader("Content-type", "application/json").PostJsonAsync(new { emails = new[] { emailReceiver } })
+                result = await url.WithHeader("Content-type", "application/json").PostJsonAsync(new { emails = new[] { emailReceiver, emailDonor, emailFacilitator } })
                                   .ReceiveJson<MuambatorDTO>();
             }
             catch (FlurlHttpTimeoutException)
diff --git a/ShareBook/ShareBook.Test.Unit/Services/BookUserServiceTests.cs b/ShareBook/ShareBook.Test.Unit/Services/BookUserServiceTests.cs
index f950d149..ade9faf6 100644
--- a/ShareBook/ShareBook.Test.Unit/Services/BookUserServiceTests.cs
+++ b/ShareBook/ShareBook.Test.Unit/Services/BookUserServiceTests.cs
@@ -22,6 +22,7 @@ public class BookUserServiceTests
         readonly Mock<IBookUsersEmailService> bookUsersEmailService;
         readonly BookUserValidator bookUserValidator;
         readonly Mock<IMuambatorService> muambatorServiceMock;
+        readonly Mock<IBookRepository> bookRepositoryMock;
 
 
         public BookUserServiceTests()
@@ -33,10 +34,9 @@ public BookUserServiceTests()
             unitOfWorkMock = new Mock<IUnitOfWork>();
             bookUsersEmailService = new Mock<IBookUsersEmailService>();
             muambatorServiceMock = new Mock<IMuambatorService>();
-
+            bookRepositoryMock = new Mock<IBookRepository>();
 
             bookServiceMock.SetReturnsDefault(true);
-
         }
 
         [Fact]
@@ -44,7 +44,8 @@ public void RequestBook()
         {
             Thread.CurrentPrincipal = new UserMock().GetClaimsUser();
             var service = new BookUserService(bookUserRepositoryMock.Object,
-                bookServiceMock.Object, bookUsersEmailService.Object, muambatorServiceMock.Object, unitOfWorkMock.Object, bookUserValidator);
+                bookServiceMock.Object, bookUsersEmailService.Object, muambatorServiceMock.Object, bookRepositoryMock.Object, 
+                unitOfWorkMock.Object, bookUserValidator);
 
             string reason = "I need this book because I'm learning a new programming language.";