diff --git a/pkg/core/object/fmt.go b/pkg/core/object/fmt.go
index 54452d95f..36ea25f94 100644
--- a/pkg/core/object/fmt.go
+++ b/pkg/core/object/fmt.go
@@ -5,6 +5,7 @@ import (
 
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
+	"github.com/nspcc-dev/neofs-api-go/pkg/storagegroup"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/pkg/errors"
 )
@@ -140,6 +141,22 @@ func (v *FormatValidator) ValidateContent(o *Object) error {
 		if v.deleteHandler != nil {
 			v.deleteHandler.DeleteObjects(o.Address(), addrList...)
 		}
+	case object.TypeStorageGroup:
+		if len(o.Payload()) == 0 {
+			return errors.Errorf("(%T) empty payload in SG", v)
+		}
+
+		sg := storagegroup.New()
+
+		if err := sg.Unmarshal(o.Payload()); err != nil {
+			return errors.Wrapf(err, "(%T) could not unmarshal SG content", v)
+		}
+
+		for _, id := range sg.Members() {
+			if id == nil {
+				return errors.Errorf("(%T) empty member in SG", v)
+			}
+		}
 	}
 
 	return nil
diff --git a/pkg/core/object/fmt_test.go b/pkg/core/object/fmt_test.go
index 8c2941a30..6ce4b4f14 100644
--- a/pkg/core/object/fmt_test.go
+++ b/pkg/core/object/fmt_test.go
@@ -9,6 +9,7 @@ import (
 	"github.com/nspcc-dev/neofs-api-go/pkg/container"
 	"github.com/nspcc-dev/neofs-api-go/pkg/object"
 	"github.com/nspcc-dev/neofs-api-go/pkg/owner"
+	"github.com/nspcc-dev/neofs-api-go/pkg/storagegroup"
 	"github.com/nspcc-dev/neofs-api-go/pkg/token"
 	crypto "github.com/nspcc-dev/neofs-crypto"
 	"github.com/nspcc-dev/neofs-node/pkg/util/test"
@@ -129,4 +130,30 @@ func TestFormatValidator_Validate(t *testing.T) {
 
 		require.NoError(t, v.ValidateContent(obj.Object()))
 	})
+
+	t.Run("storage group content", func(t *testing.T) {
+		obj := NewRaw()
+		obj.SetType(object.TypeStorageGroup)
+
+		require.Error(t, v.ValidateContent(obj.Object()))
+
+		content := storagegroup.New()
+		content.SetMembers([]*object.ID{nil})
+
+		data, err := content.Marshal()
+		require.NoError(t, err)
+
+		obj.SetPayload(data)
+
+		require.Error(t, v.ValidateContent(obj.Object()))
+
+		content.SetMembers([]*object.ID{testObjectID(t)})
+
+		data, err = content.Marshal()
+		require.NoError(t, err)
+
+		obj.SetPayload(data)
+
+		require.NoError(t, v.ValidateContent(obj.Object()))
+	})
 }