diff --git a/account_fiscal_position_autodetect_optional_vies/readme/DESCRIPTION.md b/account_fiscal_position_autodetect_optional_vies/readme/DESCRIPTION.md
index cee7aa8dc..66d747232 100644
--- a/account_fiscal_position_autodetect_optional_vies/readme/DESCRIPTION.md
+++ b/account_fiscal_position_autodetect_optional_vies/readme/DESCRIPTION.md
@@ -1,2 +1,4 @@
 This module adds vat VIES validation to fiscal positions auto detection
-system.
+system. VIES (VAT Information Exchange System) is a search engine 
+(not a database) owned by the European Commission. The data is retrieved 
+from national VAT databases when a search is made from the VIES tool.