What is the maximum size for a PDF deposited on the SY portal? What documents can I exchange with my client? Can I issue credit notes on the SY Portal? What formats does SY accept to send an invoice? Am I limited in the number of invoices I can upload to the portal? Can a file uploaded or sent by email contain several invoices? Can I upload or email an invoice or credit note that I created with my accounting tool? Can I upload, email an invoice or credit note that I created with my office software (word processing, spreadsheet, etc.)? Can I scan an invoice to send it to my client? Can I upload or send by email a pdf that is already signed?

How do I set up a shipping address for my invoices? How do I send my invoice by email? How do I send an invoice or credit note to my customer? Can I follow the processing steps of an invoice once it is uploaded on the portal? What ways are there to submit invoices? Am I informed when my invoice is covered by the portal? I uploaded to the portal or sent by email an invoice. What if it does not appear on the portal? If I do not have a billing tool, can I use the portal to enter an invoice? Can I upload several files? Can I see all the processing events for my invoices? How am I notified that my invoice is rejected? When uploading invoices, how is the "reference" field used? Is an invoice sent by email visible immediately in the invoice tracking? When uploading an invoice, should the value of the "reference" field be unique? Is an invoice uploaded to the portal visible immediately in the invoice tracking? Can I send several invoices by email at the same time? My client allows me to send invoices by email or to enter or upload them on the portal. Do I have to choose? Why do I have to identify the issuing company when I’m filing or entering an invoice? Why have I received an email with the Subject “Issuing establishment cannot be identified"? How are the order and contract numbers checked? How many tax rates can I enter?