Am I limited in the number of invoices I can upload to the portal? Franck December 20, 2018 18:08 Updated Follow No, you are not limited in the number of invoices uploaded to the portal. Comments 0 comments Article is closed for comments. Related articles Can a file uploaded or sent by email contain several invoices? What formats does SY accept to send an invoice? How do I send my invoice by email? Can I issue credit notes on the SY Portal? What is the maximum size for a PDF deposited on the SY portal?