diff --git a/pkg/packet.lua.d/properties.go b/pkg/packet.lua.d/properties.go
new file mode 100644
index 0000000..0767dd8
--- /dev/null
+++ b/pkg/packet.lua.d/properties.go
@@ -0,0 +1,32 @@
+package packet
+
+import (
+	"fmt"
+)
+
+func (pkg PacketLua) IsValid() bool {
+
+	var a, b int
+
+	for _, v := range *pkg.Plataforms {
+		a += len(*v.Sources)
+		b += len(v.Architetures)
+	}
+
+	a += len(*pkg.GlobalSources)
+
+	if a <= 0 || b <= 0 {
+		fmt.Println("invalid")
+		return false
+	}
+
+	switch {
+	case pkg.Serial == -133:
+		return false
+	case pkg.Description == "" || pkg.Maintaner == "" || pkg.Name == "" || pkg.Version == "":
+		return false
+	}
+
+	fmt.Println("valid")
+	return true
+}