Sovos applies electronic signatures on e-invoices for Post Audit countries. Electronic signatures created for countries in the European Union can be either signatures (Qualified or Advanced) or seals (Qualified or Advanced), as defined by the applicable EU legislation, and depending on the applicable VAT legislation. To learn more on the legal background for these signature types, see the compliance documentation available in the Sovos Partner Portal. The specific type of signature and the certificate authorities used are described in the Sovos TrustWeaver Compliance Map.