Extract Customs Declaration with What is Invoice OCR? Automate Invoice Data Extraction for Accounts Payable

Documento Unico Administrativo contains 54 fields in dense multi-page format.

declaration_number, customs_office, exporter, importer, hs_code, goods_description, gross_weight, invoice_value, incoterm, country_of_origin, duties, total_duties.

Invoice OCR is a specialized application of optical character recognition technology focused on automatically extracting data from supplier invoices, purchase invoices, and credit notes. Unlike general-purpose OCR that simply converts images to text, invoice OCR understands the structure of invoice documents — it knows where to find the invoice number, invoice date, supplier details, line items, quantities, unit prices, tax amounts, and totals. This understanding is achieved through a combination of layout analysis, field-level AI models, and template matching.

The process works in stages: first, the invoice image is received (scanned PDF, email attachment, EDI conversion, or mobile photo). The OCR engine digitizes all visible text, then an AI classification model identifies the document as an invoice (versus a delivery note or quote). Next, extraction models locate and capture each data field, handling variations in layout across different suppliers. Finally, validation rules check that mandatory fields are present, totals are mathematically consistent, and extracted data matches expected formats. Our [invoice extraction tutorial](/tutorials/invoice-extraction) provides a complete technical walkthrough of this pipeline.

From 0.002 EUR per Customs Declaration page. [See pricing](/tutorials/comparisons/volume-pricing).

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