VeriFactu and compliance

Yes, on all three. Signature, QR and filing with the Spanish tax agency on every invoice. No counters and no hidden extras: what you see is what you pay.

Factuarea builds the invoicing record, computes its hash, chains it to the previous document's, prints the QR on the PDF and files the record with the tax agency. There is no manual step you can forget.

The QR lets your client verify the invoice on the tax agency's site. The CSV is the secure verification code returned when the record is accepted. Both are stored with the invoice.

A filed invoice is never deleted. It is voided or corrected with a credit note, and that operation produces its own chained record: which is exactly what the rules are after: that the whole history can be reconstructed.

Yes: filings are signed with your company's certificate, which you upload from the account settings. The software's responsible declaration is recorded as well.

No. VeriFactu is how an invoice is recorded and reported to the tax agency; an e-invoice is the structured format in which it is exchanged with the recipient. Two separate obligations, and Factuarea covers both.