diff --git a/engine/filters.go b/engine/filters.go
index 3e5d91ac1..90a332dc6 100644
--- a/engine/filters.go
+++ b/engine/filters.go
@@ -35,6 +35,7 @@ const (
 	MetaPrefix         = "*prefix"
 	MetaSuffix         = "*suffix"
 	MetaEmpty          = "*empty"
+	MetaExists         = "*exists"
 	MetaTimings        = "*timings"
 	MetaRSR            = "*rsr"
 	MetaStatS          = "*stats"
@@ -162,12 +163,12 @@ func NewFilterRule(rfType, fieldName string, vals []string) (*FilterRule, error)
 		negative = true
 	}
 	if !utils.IsSliceMember([]string{MetaString, MetaPrefix, MetaSuffix,
-		MetaTimings, MetaRSR, MetaStatS, MetaDestinations, MetaEmpty,
+		MetaTimings, MetaRSR, MetaStatS, MetaDestinations, MetaEmpty, MetaExists,
 		MetaLessThan, MetaLessOrEqual, MetaGreaterThan, MetaGreaterOrEqual}, rfType) {
 		return nil, fmt.Errorf("Unsupported filter Type: %s", rfType)
 	}
 	if fieldName == "" && utils.IsSliceMember([]string{MetaString, MetaPrefix, MetaSuffix,
-		MetaTimings, MetaDestinations, MetaLessThan, MetaEmpty,
+		MetaTimings, MetaDestinations, MetaLessThan, MetaEmpty, MetaExists,
 		MetaLessOrEqual, MetaGreaterThan, MetaGreaterOrEqual}, rfType) {
 		return nil, fmt.Errorf("FieldName is mandatory for Type: %s", rfType)
 	}
@@ -251,6 +252,8 @@ func (fltr *FilterRule) Pass(dP config.DataProvider, rpcClnt rpcclient.RpcClient
 		result, err = fltr.passString(dP)
 	case MetaEmpty:
 		result, err = fltr.passEmpty(dP)
+	case MetaExists:
+		result, err = fltr.passExists(dP)
 	case MetaPrefix:
 		result, err = fltr.passStringPrefix(dP)
 	case MetaSuffix:
@@ -290,6 +293,17 @@ func (fltr *FilterRule) passString(dP config.DataProvider) (bool, error) {
 	return false, nil
 }
 
+func (fltr *FilterRule) passExists(dP config.DataProvider) (bool, error) {
+	_, err := dP.FieldAsInterface(strings.Split(fltr.FieldName, utils.NestingSep))
+	if err != nil {
+		if err == utils.ErrNotFound {
+			return false, nil
+		}
+		return false, err
+	}
+	return true, nil
+}
+
 func (fltr *FilterRule) passEmpty(dP config.DataProvider) (bool, error) {
 	val, err := dP.FieldAsInterface(strings.Split(fltr.FieldName, utils.NestingSep))
 	if err != nil {
diff --git a/engine/filters_test.go b/engine/filters_test.go
index 3cac4d33f..b1122ff3d 100644
--- a/engine/filters_test.go
+++ b/engine/filters_test.go
@@ -114,6 +114,58 @@ func TestFilterPassEmpty(t *testing.T) {
 	}
 }
 
+func TestFilterPassExists(t *testing.T) {
+	cd := &CallDescriptor{
+		Direction:     "*out",
+		Category:      "",
+		Tenant:        "cgrates.org",
+		Subject:       "dan",
+		Destination:   "+4986517174963",
+		TimeStart:     time.Date(2013, time.October, 7, 14, 50, 0, 0, time.UTC),
+		TimeEnd:       time.Date(2013, time.October, 7, 14, 52, 12, 0, time.UTC),
+		DurationIndex: 132 * time.Second,
+		ExtraFields:   map[string]string{"navigation": "off"},
+	}
+	rf := &FilterRule{Type: MetaExists, FieldName: "Category", Values: []string{}}
+	if passes, err := rf.passExists(cd); err != nil {
+		t.Error(err)
+	} else if !passes {
+		t.Error("Not passes filter")
+	}
+	rf = &FilterRule{Type: MetaExists, FieldName: "Direction", Values: []string{}}
+	if passes, err := rf.passExists(cd); err != nil {
+		t.Error(err)
+	} else if !passes {
+		t.Error("Not passes filter")
+	}
+	rf = &FilterRule{Type: MetaExists, FieldName: "ExtraFields1", Values: []string{}}
+	if passes, err := rf.passExists(cd); err != nil {
+		t.Error(err)
+	} else if passes {
+		t.Error("Filter passes")
+	}
+	cd.ExtraFields = map[string]string{}
+	rf = &FilterRule{Type: MetaExists, FieldName: "ExtraFields", Values: []string{}}
+	if passes, err := rf.passExists(cd); err != nil {
+		t.Error(err)
+	} else if !passes {
+		t.Error("Not passes filter")
+	}
+	//not
+	rf = &FilterRule{Type: "*notexists", FieldName: "Direction", Values: []string{}}
+	if passes, err := rf.Pass(cd, nil); err != nil {
+		t.Error(err)
+	} else if passes {
+		t.Error("Filter passes")
+	}
+	rf = &FilterRule{Type: "*notexists", FieldName: "Category1", Values: []string{}}
+	if passes, err := rf.Pass(cd, nil); err != nil {
+		t.Error(err)
+	} else if !passes {
+		t.Error("Not passes filter")
+	}
+}
+
 func TestFilterPassStringPrefix(t *testing.T) {
 	cd := &CallDescriptor{
 		Direction:     "*out",
@@ -409,6 +461,14 @@ func TestFilterNewRequestFilter(t *testing.T) {
 	if !reflect.DeepEqual(erf, rf) {
 		t.Errorf("Expecting: %+v, received: %+v", erf, rf)
 	}
+	rf, err = NewFilterRule(MetaExists, "MetaExists", []string{})
+	if err != nil {
+		t.Errorf("Error: %+v", err)
+	}
+	erf = &FilterRule{Type: MetaExists, FieldName: "MetaExists", Values: []string{}}
+	if !reflect.DeepEqual(erf, rf) {
+		t.Errorf("Expecting: %+v, received: %+v", erf, rf)
+	}
 	rf, err = NewFilterRule(MetaPrefix, "MetaPrefix", []string{"stringPrefix"})
 	if err != nil {
 		t.Errorf("Error: %+v", err)
@@ -656,6 +716,18 @@ func TestInlineFilterPassFiltersForEvent(t *testing.T) {
 			t.Errorf("For %s expecting: %+v, received: %+v", key, true, pass)
 		}
 	}
+	if pass, err := filterS.Pass("cgrates.org", []string{"*exists:" + "NewKey" + ":"},
+		config.NewNavigableMap(failEvent)); err != nil {
+		t.Errorf(err.Error())
+	} else if pass {
+		t.Errorf("For NewKey expecting: %+v, received: %+v", false, pass)
+	}
+	if pass, err := filterS.Pass("cgrates.org", []string{"*notexists:" + "NewKey" + ":"},
+		config.NewNavigableMap(failEvent)); err != nil {
+		t.Errorf(err.Error())
+	} else if !pass {
+		t.Errorf("For NewKey expecting: %+v, received: %+v", true, pass)
+	}
 }
 
 func TestPassFiltersForEventWithEmptyFilter(t *testing.T) {
diff --git a/engine/poster_test.go b/engine/poster_test.go
deleted file mode 100644
index c607b0784..000000000
--- a/engine/poster_test.go
+++ /dev/null
@@ -1,18 +0,0 @@
-/*
-Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
-Copyright (C) ITsysCOM GmbH
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>
-*/
-package engine