14.5.2.1. Change in expected credit loss of trade receivables
| NOTE | 2021 | 2020 | |
| At the beginning of the period | 516 | 458 | |
| Recognition | 13.12 | 248 | 248 |
| Reversal | 13.12 | (154) | (175) |
| Foreign exchange differences | 5 | 4 | |
| Other | 2 | (19) | |
| 617 | 516 |
The Group defines trade receivables covered by the simplified ECL model as deliveries and services under contracts with customers and other.