Stop at the unreadable field: a practical recovery path for damaged labels
Identify the exact missing evidence, recapture or seek a matching source, and avoid calculations built on guessed label text.
When part of a label is unreadable, pause only the task that depends on that part. You can preserve readable information while marking the missing field unresolved. Do not complete a damaged number from memory or from what similar foods usually contain.
Name the missing evidence
Write a specific gap: serving weight obscured, nutrient unit unreadable, final ingredient line missing, or column heading cropped. This is more useful than a general note saying bad photo. It tells you which new evidence would allow the task to continue.
The European Commission nutrition guidance describes information in a nutrition declaration. Use the appropriate label structure to identify what is missing, without treating a template as evidence of the actual values.
Try a targeted recapture
For glare, change the angle or lighting so the reflection moves away from the text. For a curved package, photograph smaller overlapping sections while keeping a full-panel reference. For a fold, reposition the unopened package gently if feasible without damaging it or covering other text.
Inspect the new image immediately. A larger file is not helpful if the same characters remain obscured. Avoid repeated enlargements that create an appearance of detail without revealing the original print.
Choose a matching alternative source
If the physical label cannot be recovered, look for a manufacturer source that matches market, flavor, pack size and version as closely as possible. Keep the alternative source clearly labeled. A similar retailer picture can help identify a product but does not automatically resolve the missing field.
In a fictional case, the nutrient amount is visibly 4 g but the serving weight is torn away. Without the denominator, you cannot calculate the amount per 100 g. A guessed 40 g serving would give 10 g per 100 g, while a guessed 50 g serving would give 8 g. Neither is justified by the visible 4 g alone.
Record the task as pending the serving weight, then continue with unrelated readable fields. If the uncertainty concerns allergen wording or personal food suitability, do not use a guessed reconstruction to decide that the food is safe. The stopping point is a useful outcome: it prevents a missing piece of evidence from becoming an exact-looking but unsupported result.