diff --git a/MKStoreKit/MKStoreKit.h b/MKStoreKit/MKStoreKit.h
index 4401bec..12c3615 100644
--- a/MKStoreKit/MKStoreKit.h
+++ b/MKStoreKit/MKStoreKit.h
@@ -65,6 +65,12 @@
  */
 extern NSString *const kMKStoreKitProductsAvailableNotification;
 
+
+/*!
+ *  @abstract This notification is posted when if MKStoreKit finds invalid product ids after initialization sequence
+ */
+extern NSString *const kMKStoreKitProductsInvalidIdsNotification;
+
 /*!
  *  @abstract This notification is posted when MKStoreKit completes purchase of a product
  */
diff --git a/MKStoreKit/MKStoreKit.m b/MKStoreKit/MKStoreKit.m
index c4c678d..e025250 100644
--- a/MKStoreKit/MKStoreKit.m
+++ b/MKStoreKit/MKStoreKit.m
@@ -40,6 +40,7 @@
 
 @import StoreKit;
 NSString *const kMKStoreKitProductsAvailableNotification = @"com.mugunthkumar.mkstorekit.productsavailable";
+NSString *const kMKStoreKitProductsInvalidIdsNotification = @"com.mugunthkumar.mkstorekit.productsinvalidids";
 NSString *const kMKStoreKitProductPurchasedNotification = @"com.mugunthkumar.mkstorekit.productspurchased";
 NSString *const kMKStoreKitProductPurchaseFailedNotification = @"com.mugunthkumar.mkstorekit.productspurchasefailed";
 NSString *const kMKStoreKitProductPurchaseDeferredNotification = @"com.mugunthkumar.mkstorekit.productspurchasedeferred";
@@ -135,7 +136,7 @@ - (void)restorePurchaseRecord {
   if (self.purchaseRecord == nil) {
     self.purchaseRecord = [NSMutableDictionary dictionary];
   }
-  NSLog(@"%@", self.purchaseRecord);
+//  NSLog(@"[MKStoreKit] self.purchaseRecord: %@", self.purchaseRecord);
 }
 
 - (void)savePurchaseRecord {
@@ -148,10 +149,10 @@ - (void)savePurchaseRecord {
 #endif
 
   if (!success) {
-    NSLog(@"Failed to remember data record");
+    NSLog(@"[MKStoreKit] Failed to remember data record");
   }
 
-  NSLog(@"%@", self.purchaseRecord);
+//  NSLog(@"[MKStoreKit] self.purchaseRecord: %@", self.purchaseRecord);
 }
 
 #pragma mark -
@@ -214,7 +215,8 @@ - (void)startProductRequest {
 
 - (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response {
   if (response.invalidProductIdentifiers.count > 0) {
-    NSLog(@"Invalid Product IDs: %@", response.invalidProductIdentifiers);
+    [[NSNotificationCenter defaultCenter] postNotificationName:kMKStoreKitProductsInvalidIdsNotification
+                                                        object:response.invalidProductIdentifiers];
   }
 
   self.availableProducts = response.products;
@@ -223,7 +225,7 @@ - (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProdu
 }
 
 - (void)request:(SKRequest *)request didFailWithError:(NSError *)error {
-  NSLog(@"Product request failed with error: %@", error);
+  NSLog(@"[MKStoreKit] Product request failed with error: %@", error);
 }
 
 #pragma mark -
@@ -248,7 +250,7 @@ - (void)initiatePaymentRequestForProductWithIdentifier:(NSString *)productId {
   if (!self.availableProducts) {
     // TODO: FIX ME
     // Initializer might be running or internet might not be available
-    NSLog(@"No products are available. Did you initialize MKStoreKit by calling [[MKStoreKit sharedKit] startProductRequest]?");
+    NSLog(@"[MKStoreKit] No products are available. Did you initialize MKStoreKit by calling [[MKStoreKit sharedKit] startProductRequest]?");
   }
 
   if (![SKPaymentQueue canMakePayments]) {
@@ -290,10 +292,10 @@ - (void)requestDidFinish:(SKRequest *)request {
   if([request isKindOfClass:[SKReceiptRefreshRequest class]]) {
     NSURL *receiptUrl = [[NSBundle mainBundle] appStoreReceiptURL];
     if ([[NSFileManager defaultManager] fileExistsAtPath:[receiptUrl path]]) {
-      NSLog(@"App receipt exists. Preparing to validate and update local stores.");
+      NSLog(@"[MKStoreKit] App receipt exists. Preparing to validate and update local stores.");
       [self startValidatingReceiptsAndUpdateLocalStore];
     } else {
-      NSLog(@"Receipt request completed but there is no receipt. The user may have refused to login, or the reciept is missing.");
+      NSLog(@"[MKStoreKit] Receipt request completed but there is no receipt. The user may have refused to login, or the reciept is missing.");
       // Disable features of your app, but do not terminate the app
     }
   }
@@ -312,7 +314,7 @@ - (void)startValidatingAppStoreReceiptWithCompletionHandler:(void (^)(NSArray *r
   NSData *receiptData = [NSData dataWithContentsOfURL:receiptURL];
   if (!receiptData) {
     // Validation fails
-    NSLog(@"Receipt exists but there is no data available. Try refreshing the reciept payload and then checking again.");
+    NSLog(@"[MKStoreKit] Receipt exists but there is no data available. Try refreshing the reciept payload and then checking again.");
     completionHandler(nil, nil);
     return;
   }
@@ -387,7 +389,7 @@ - (BOOL)purchasedAppBeforeVersion:(NSString *)requiredVersion {
 - (void)startValidatingReceiptsAndUpdateLocalStore {
   [self startValidatingAppStoreReceiptWithCompletionHandler:^(NSArray *receipts, NSError *error) {
     if (error) {
-      NSLog(@"Receipt validation failed with error: %@", error);
+      NSLog(@"[MKStoreKit] Receipt validation failed with error: %@", error);
       [[NSNotificationCenter defaultCenter] postNotificationName:kMKStoreKitReceiptValidationFailedNotification object:error];
     } else {
       __block BOOL purchaseRecordDirty = NO;
@@ -517,14 +519,14 @@ - (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)tran
 }
 
 - (void)failedTransaction:(SKPaymentTransaction *)transaction inQueue:(SKPaymentQueue *)queue {
-  NSLog(@"Transaction Failed with error: %@", transaction.error);
+  NSLog(@"[MKStoreKit] Transaction Failed with error: %@", transaction.error);
   [queue finishTransaction:transaction];
   [[NSNotificationCenter defaultCenter] postNotificationName:kMKStoreKitProductPurchaseFailedNotification
                                                       object:transaction.payment.productIdentifier];
 }
 
 - (void)deferredTransaction:(SKPaymentTransaction *)transaction inQueue:(SKPaymentQueue *)queue {
-  NSLog(@"Transaction Deferred: %@", transaction);
+  NSLog(@"[MKStoreKit] Transaction Deferred: %@", transaction);
   [[NSNotificationCenter defaultCenter] postNotificationName:kMKStoreKitProductPurchaseDeferredNotification
                                                       object:transaction.payment.productIdentifier];
 }