diff --git a/parser/plan.go b/parser/plan.go
new file mode 100644
index 0000000..f01d45a
--- /dev/null
+++ b/parser/plan.go
@@ -0,0 +1,16 @@
+package parser
+
+import "strings"
+
+const (
+	TypePLN = "PLN"
+)
+
+func isPln(telegram Telegram) bool {
+	for _, value := range telegram.Fields {
+		if strings.HasPrefix(value, TypePLN) {
+			return true
+		}
+	}
+	return false
+}