Technical referenceTroubleshootingFast answers for common invoice, email, payment and automation issues.Invoices I cannot issue — validation failsTotals mismatch on issueI need to change an issued invoiceThere is a gap in my invoice numbersEditing a client did not update an invoice I already sent Documents No payment QR on the PDFCzech characters look wrong in the PDFMy logo does not appearNo ISDOC download on an imported invoice Email Sending fails immediatelyDelivery status never leaves 'sent'Overdue reminders never fireRecurring drafts never appearEmails land in spamA recipient is suppressed Payments Fio connect fails or sync errorsProposals appear but invoices stay unpaidAutomatic sync seems stuck Automation MCP returns unauthorized on everythingAn assistant invented issuer detailsThe Slack bot never respondsinvoicey: command not foundInvoicey Drive is empty in Finder Lookups & sign-in ARES lookup returns nothingOnly one sign-in provider appearsMCP toolsTool inputs, outputs, confirmation rules and availability.
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