| U21 EURO Qualifiers 2023/2024 - Appearances as Referee |  |
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| 17/10/2023 | Kazakhstan | - | Spain | 0:4 | 5 | - | - |
| 17/11/2023 | Norway | - | Ireland | 3:2 | 3 | - | - |
| U21 EURO Qualifiers 2023/2024 - Appearances as Referee | |
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| 17/10/2023 | Kazakhstan | - | Spain | 0:4 | 5 | - | - |
| 17/11/2023 | Norway | - | Ireland | 3:2 | 3 | - | - |
| Complete name: | Walter Altmann |
| Born: | 24/12/1984 |
| Place of birth: |
Austria |
| Nationality: |
Austria |