diff --git a/src/Collection.js b/src/Collection.js
index 4e1c16735..befb51b61 100644
--- a/src/Collection.js
+++ b/src/Collection.js
@@ -367,7 +367,7 @@ Collection.prototype.mCreateDocument = function (documents, options, cb) {
   });
 
   self.kuzzle.query(this.buildQueryArgs('document', 'mCreate'), data, options, cb && function (err, res) {
-    cb(err, err ? undefined : res.result);
+    cb(err, res && res.result);
   });
 
   return self;
@@ -403,7 +403,7 @@ Collection.prototype.mCreateOrReplaceDocument = function (documents, options, cb
   });
 
   self.kuzzle.query(this.buildQueryArgs('document', 'mCreateOrReplace'), data, options, cb && function (err, res) {
-    cb(err, err ? undefined : res.result);
+    cb(err, res && res.result);
   });
 
   return self;
@@ -437,7 +437,7 @@ Collection.prototype.mDeleteDocument = function (documentIds, options, cb) {
   self.kuzzle.callbackRequired('Collection.mDelete', cb);
 
   self.kuzzle.query(this.buildQueryArgs('document', 'mDelete'), data, options, cb && function (err, res) {
-    cb(err, err ? undefined : res.result);
+    cb(err, res && res.result);
   });
 
   return self;
@@ -540,7 +540,7 @@ Collection.prototype.mUpdateDocument = function (documents, options, cb) {
   });
 
   self.kuzzle.query(this.buildQueryArgs('document', 'mUpdate'), data, options, cb && function (err, res) {
-    cb(err, err ? undefined : res.result);
+    cb(err, res && res.result);
   });
 
   return self;
diff --git a/test/Collection/methods.test.js b/test/Collection/methods.test.js
index fec2d3afc..1bf950228 100644
--- a/test/Collection/methods.test.js
+++ b/test/Collection/methods.test.js
@@ -866,6 +866,33 @@ describe('Collection methods', function () {
 
       kuzzle.query.yield(null, { result: result });
     });
+
+    it('should handle partial errors', function (done) {
+      this.timeout(50);
+
+      collection.mCreateDocument(content.documents, function (err, res) {
+        should(res).be.instanceof(Object);
+        should(res).match(result);
+        should(err).be.instanceof(Object);
+        should(err).match({status: 206});
+        done();
+      });
+
+      kuzzle.query.yield({status: 206}, { result: result });
+    });
+
+    it('should handle global errors', function (done) {
+      this.timeout(50);
+
+      collection.mCreateDocument(content.documents, function (err, res) {
+        should(res).be.undefined();
+        should(err).be.instanceof(Object);
+        should(err).match({status: 503});
+        done();
+      });
+
+      kuzzle.query.yield({status: 503});
+    });
   });
 
   describe('#mCreateOrReplaceDocument', function () {
@@ -916,6 +943,33 @@ describe('Collection methods', function () {
 
       kuzzle.query.yield(null, { result: result });
     });
+
+    it('should handle partial errors', function (done) {
+      this.timeout(50);
+
+      collection.mCreateOrReplaceDocument(content.documents, function (err, res) {
+        should(res).be.instanceof(Object);
+        should(res).match(result);
+        should(err).be.instanceof(Object);
+        should(err).match({status: 206});
+        done();
+      });
+
+      kuzzle.query.yield({status: 206}, { result: result });
+    });
+
+    it('should handle global errors', function (done) {
+      this.timeout(50);
+
+      collection.mCreateOrReplaceDocument(content.documents, function (err, res) {
+        should(res).be.undefined();
+        should(err).be.instanceof(Object);
+        should(err).match({status: 503});
+        done();
+      });
+
+      kuzzle.query.yield({status: 503});
+    });
   });
 
   describe('#mDeleteDocument', function () {
@@ -960,6 +1014,33 @@ describe('Collection methods', function () {
 
       kuzzle.query.yield(null, { result: result });
     });
+
+    it('should handle partial errors', function (done) {
+      this.timeout(50);
+
+      collection.mDeleteDocument(content.ids, function (err, res) {
+        should(res).be.instanceof(Object);
+        should(res).match(result);
+        should(err).be.instanceof(Object);
+        should(err).match({status: 206});
+        done();
+      });
+
+      kuzzle.query.yield({status: 206}, { result: result });
+    });
+
+    it('should handle global errors', function (done) {
+      this.timeout(50);
+
+      collection.mDeleteDocument(content.ids, function (err, res) {
+        should(res).be.undefined();
+        should(err).be.instanceof(Object);
+        should(err).match({status: 503});
+        done();
+      });
+
+      kuzzle.query.yield({status: 503});
+    });
   });
 
   describe('#mGetDocument', function () {
@@ -1096,13 +1177,41 @@ describe('Collection methods', function () {
       this.timeout(50);
 
       collection.mUpdateDocument(content.documents, function (err, res) {
-        should(res).should.be.instanceof(Object);
+        should(res).be.instanceof(Object);
         should(res).match(result);
+        should(err).be.null();
         done();
       });
 
       kuzzle.query.yield(null, { result: result });
     });
+
+    it('should handle partial errors', function (done) {
+      this.timeout(50);
+
+      collection.mUpdateDocument(content.documents, function (err, res) {
+        should(res).be.instanceof(Object);
+        should(res).match(result);
+        should(err).be.instanceof(Object);
+        should(err).match({status: 206});
+        done();
+      });
+
+      kuzzle.query.yield({status: 206}, { result: result });
+    });
+
+    it('should handle global errors', function (done) {
+      this.timeout(50);
+
+      collection.mUpdateDocument(content.documents, function (err, res) {
+        should(res).be.undefined();
+        should(err).be.instanceof(Object);
+        should(err).match({status: 503});
+        done();
+      });
+
+      kuzzle.query.yield({status: 503});
+    });
   });
 
   describe('#getSpecifications', function () {