fix: checkbox states not showing in signed PDF for legacy uploads

Flatten the pdf-lib form before saving to bake checkbox/radio appearances into the PDF content. This ensures checked states are preserved when the PDF is subsequently processed by libpdf for final signing.
2026-06-22 12:22:14 +10:00 · 2026-01-30 14:39:06 +02:00
1 changed files with 5 additions and 0 deletions
@@ -388,6 +388,11 @@ const decorateAndSignPdf = async ({
      }
    }

+    // Flatten the form to bake checkbox/radio appearances into the PDF content
+    // This ensures proper rendering when the PDF is processed by libpdf
+    const form = legacy_pdfLibDoc.getForm();
+    form.flatten();
+
    await pdfDoc.reload(await legacy_pdfLibDoc.save());
  }