In SIGN ES the integration flow is essentially the same for both Verifactu and TicketBAI.
The differences come from territory-specific rules related to (1) how to handle offline/connection-loss scenarios, and (2) the QR placement and mandatory texts on the invoice.
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Offline / connection-loss:
Verifactu: Article
TicketBAI: Article
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QR positioning & compliant texts:
Verifactu: https://workspace.fiskaly.com/sign-es/invoicecompliance-verifactu/
TicketBAI: https://workspace.fiskaly.com/sign-es/invoice-compliance/