Guide outlines best practices for extracting invoice data from PDFs in marketplaces

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A technical guide advises using rule-based extraction for invoices from controlled templates with stable layouts, especially when validating digital signatures. It recommends model-based extraction for handling varied layouts from unknown sellers or scanned documents, but warns it can produce unsupported values. For mixed marketplaces, a cascade system is suggested, first preserving the original PDF, verifying signatures, using rules, and then routing uncertain fields to a model. The advice stresses that every extraction decision and its evidence, like page location and model version, must be recorded in an audit trail for traceability.

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