Currently there is no rule on which QR code error correction level to use, venues are free to pick their error correction levels depending on their own situation.
| Level | Correction Percentage |
|---|---|
| L (Low) | 7% |
| M (Medium) | 15% |
| Q (Quartile) | 25% |
| H (High) | 30% |
If there is no preference then level M is recommended.
Please post below if you have comments about QR Error Correction levels.