diff --git a/api.py b/api.py
index 828003c..49faf1b 100644
--- a/api.py
+++ b/api.py
@@ -31,7 +31,8 @@ def print_bill(data, address):
     printer.text(d["shop_address"]+'\n')
     printer.set(align='right', bold=False, height=1, width=1)
     printer.textln('========================')
-    if d['invoice']:
+
+    if d['invoice'] and d['invoice']['resolution']:
         text = "Resolucion de Facturacion # "+str(d['invoice']['resolution']['resolution_number']) \
             + "\nValida desde "+d['invoice']['resolution']['valid_date_time_from']+ \
             " hasta "+str(d['invoice']['resolution']['valid_date_time_to'])