A good scan of a receipt can make all the difference: between a smooth tax return and a lengthy correspondence with the tax office. But not every scan is created equal. Here's what really matters when scanning receipts and invoices.
Phone or Scanner — Which Is Better?
The Smartphone Scanner
For everyday use, your smartphone is the best choice. Advantages:
- Always with you — scan immediately when you receive a receipt
- Free — no extra purchase needed
- Fast — one photo is all it takes, the app does the rest
- Automatic optimization — good apps crop, enhance contrast, and correct distortion. Just like DocNado does for your documents. 😊
The Flatbed Scanner
For specific requirements, a flatbed scanner can be useful:
- High quality — perfect color reproduction and sharpness
- Bound documents — books, magazine articles
- Old documents — fragile originals that shouldn't be bent
- Large volumes — automatic document feeder saves time
Bottom line: For 95% of cases, your smartphone is all you need.
Lighting
The most common source of errors is poor lighting:
- ✅ Good, even light — daylight or bright room lighting
- ✅ No flash — causes reflections and unreadable spots
- ✅ No shadows — place the receipt flat on a solid-colored surface
- ❌ Dim lighting — text becomes blurry
- ❌ Backlight — paper appears translucent
Background
- Solid, dark surface — black or dark gray
- No patterns — the scanner app needs to detect the document
- Flat surface — avoid creases and folds
Common Scanning Mistakes
1. Incomplete Receipt
Make sure all four corners of the receipt are in the frame. Especially with long receipts, part of the content often gets cut off.
2. Skewed Perspective
Hold your phone as parallel as possible above the document. Tilting makes text harder to read and can interfere with OCR recognition.
3. Creases and Folds
Smooth out the receipt before scanning. Creases cause shadows and unreadable areas.
4. Fingers in the Frame
Sounds obvious, but happens often. Hold the receipt at the edges or use a holder.
OCR — Why Text Recognition Is Crucial
OCR (Optical Character Recognition) turns an image into a searchable text. This means:
- You can search by amounts ("all invoices over €50")
- Find documents by provider ("ALDI", "Amazon")
- Search by date ("all receipts from March 2026")
- Tax-relevant data is recognized automatically
How OCR Works:
- The camera takes a photo of the receipt
- DocNado analyzes the image and recognizes letters and numbers
- The recognized text is placed as a searchable layer over the image
- You can now search for any word in the document
Modern AI scanners like DocNado go even further: they don't just recognize text, they understand the context — and automatically assign amounts, dates, providers, and categories.
Archiving: What Tax Authorities Expect
GoBD — The Basics
The GoBD (Principles for the Proper Management and Storage of Books, Records and Documents in Electronic Form) apply to business owners and self-employed individuals. For private individuals, they serve as good guidance:
- Traceability — The scan must reproduce the original completely and unaltered
- Completeness — All documents must be captured
- Immutability — Scans must not be edited after creation
- Readability — All information must be clearly visible
Practical Tips:
- Scan immediately — not weeks later
- Name consistently — e.g., "2026-05-09_Supermarket_ALDI_42.50€"
- Secure storage — encrypted cloud or local backup
- Keep originals — for business use, keep alongside the scan
The Easiest Method: AI-Powered Scanning with DocNado
Instead of dealing with settings, file formats, and naming conventions, an AI-powered app like DocNado can automate the entire process:
- Photograph the receipt — the app automatically detects edges and crops
- AI analyzes — amounts, dates, providers, and categories are recognized automatically
- Encrypted storage — the scan is stored securely and is always searchable
- Done — no manual naming, sorting, or categorizing needed
This doesn't just save time — it reduces errors. The AI recognizes more than the human eye — and never forgets to categorize a receipt.
Benefits at a Glance:
- 🤖 Automatic text recognition — no manual typing
- 🔒 Encrypted — your data belongs to you
- 🔍 Full-text search — find any receipt in seconds
- 🏷️ Smart tags — automatic categorization
- 📱 Any device — phone, tablet, desktop