How do I respond to rejections without an explanation?

Professionally — and actively. Request feedback with this wording: 'Thank you very much for your response. I would be very grateful if you could let me know which aspect of my application was decisive — this would greatly help my further development.' Approximately 20–30% of recruiters provide feedback — and it is often more direct than expected. GDPR Article 15: you have the right of access to stored data, not to decision reasons. GDPR Article 22: for fully automated decisions, you have the right to human review — relevant if ATS rejected you. AGG Section 61b: if you suspect discrimination, you must file a claim within 2 months. Practically: use rejections analytically — three rejections from the same industry for the same positions signal a systematic gap.