HTPBE_
HTPBE_INVISIBLE_DUPLICATE_TEXT appears on 0.1% of modified results in our corpus. A marker is evidence about the file, not a judgement about the person who sent it.
Back to all checksMarker profileContent Stream Analysis
Hidden text on the page that does not add up.
Marker profile
What HTPBE_INVISIBLE_DUPLICATE_TEXT tells you
HTPBE_INVISIBLE_DUPLICATE_TEXT is one of the named findings returned in modification_markers when a PDF is reported as modified. It belongs to the Content Stream Analysis group of checks. These checks look at the content of the pages themselves for signs of edits made after the document was authored.
On 28.6% of the modified results that carry HTPBE_INVISIBLE_DUPLICATE_TEXT it is the only marker. A result with this marker carries 2.3 markers on average. It is most often found together with HTPBE_DATES_DISAGREE, on 42.9% of these results.
Example API response
How it appears in a result
When a PDF is reported as modified, HTPBE_INVISIBLE_DUPLICATE_TEXT is listed in modification_markers next to the verdict and its confidence. Each marker is a named, actionable finding – not a score.
{
"id": "9f3a2c1d-8b47-4e6f-a012-3d5e7f890123",
"status": "modified",
"modification_confidence": "high",
"modification_markers": [
"HTPBE_INVISIBLE_DUPLICATE_TEXT"
],
"creator": "Adobe Acrobat Pro DC",
"has_incremental_updates": true,
"page_count": 3
}Full schema in the API reference →
Distributions
What ships alongside HTPBE_INVISIBLE_DUPLICATE_TEXT
The tools, formats and document traits that appear on the modified results carrying this marker. Shares are of those results.
Common Creators
Apache FOP is the Creator on 42.9% of these results.
Often found together with
HTPBE_DATES_DISAGREE sits next to HTPBE_INVISIBLE_DUPLICATE_TEXT more often than any other marker.
Document origin
Confidence of the verdict
When these results were checked
Document length
File size
PDF versions
Year the document says it was created
Long tail
Notable observations
Smaller cuts of the results carrying HTPBE_INVISIBLE_DUPLICATE_TEXT – useful context, but treat each row as a single data point rather than a strong signal.
Of files carry at least one digital signature
Of files contain earlier saved revisions
Of files contain JavaScript code
Of files have attachments inside
Average number of markers on these results
Related checks
Other Content Stream Analysis checks
Checks from the same group. Each card links to its own reference page.
HTPBE_CONTENT_STREAM_EDITING_MARKERSEditing traces within the document’s pagesHTPBE_DRAWING_OPS_INCONSISTENTPage drawing evidence consistent with editingHTPBE_PRINTED_OUT_OF_PDF_READERDocument printed to a new PDF after its original creationHTPBE_TEXT_OVERLAY_ON_SCANSigns of text added over existing page contentHTPBE_CHARACTER_OVERLAY_EDITLocalised edits placed over the original page textHTPBE_GLYPH_LEVEL_EDITIndividual characters that appear replaced after authoringHTPBE_MIXED_FONT_EMBEDDINGFont usage on a page that points to text added after authoringHTPBE_PARTIAL_FONT_REPLACEMENTOriginal fonts that appear partly replaced after authoringHTPBE_BURNED_IN_ANNOTATIONSAnnotations that appear merged into the page contentHTPBE_WIDGET_APPEARANCE_MISMATCHA form field showing signs of alterationHTPBE_INCOMPLETE_REDACTIONA redaction that did not fully conceal its contentHTPBE_PAGE_REGION_SUBSTITUTEDSigns that part of a page was replaced after creationFAQ
HTPBE_INVISIBLE_DUPLICATE_TEXT: common questions
What does HTPBE_INVISIBLE_DUPLICATE_TEXT mean?
Does HTPBE_INVISIBLE_DUPLICATE_TEXT mean the document is fake?
What should I do when a result contains HTPBE_INVISIBLE_DUPLICATE_TEXT?
How common is HTPBE_INVISIBLE_DUPLICATE_TEXT?
Where do I see HTPBE_INVISIBLE_DUPLICATE_TEXT?
Secure your workflow
Create your account – check PDFs on the web or with an API key, both ready on signup.
No sales call. Cancel any time.