To help other people who have the same issue, I will share what I just did to retrieve the invoice link. This is inefficient, but the only way I found to make it work. 1. Get account transaction invoices. /v1/transactions/invoices/accounts/{account-key} 2. Identify the invoice by filtering by invoice number... 3. Call Get Invoice files by invoice id. /v1/invoices/{invoiceId}/files 4. Retrieve the pdfFileUrl value(s) depends on whether you split invoice. We don't 5. The link you exposed to customer should not be the pdfFileUrl, instead, it should be a system route which call the pdfFileUrl with system access token. Hopefully it helps
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