 For Business to Business (B2B) shipments: Tax ID number or mobile phone number of the receiver are mandatory data fields to complete

 the simplified customs declaration.

 For Business to Consumer (B2C) shipments: Turkish ID number or mobile phone number of the receiver are mandatory data fields to complete 

the simplified customs declaration.

 The simplified customs declaration is used in Türkiye in case of, Business to Business (B2B) shipments with a value for customs purposes* up 

to 22 EUR and  for Business to Consumer (B2C) shipments with a value for customs purposes* for up to 30 EUR