Withdrawal function (§ 356a BGB, mandatory since 19 June 2026):
- /vertrag-widerrufen: two-step flow "Vertrag widerrufen" ->
"Widerruf bestätigen", no login, only name, order number and e-mail
required. Prominent footer button on every page, prefilled link per
order in the customer account.
- /api/widerruf stores every declaration (matched to the order only if
order number and e-mail fit), mails a receipt with the declaration and
the exact time of receipt, notifies ADMIN_EMAIL. Same response for
matching and non-matching orders (no enumeration), origin check and
rate limit instead of a CAPTCHA that could block a statutory right.
User input is HTML-escaped and stripped of line breaks in headers.
- /admin/widerrufe lists declarations, open ones first, with an
open-count badge and "mark as done".
- Withdrawal notice gains the statutory sentence on the online function.
Other fixes:
- Newsletter stores confirmedAt as proof of consent (Art. 7(1) GDPR).
- "Recently viewed" is only persisted with consent (§ 25(1) TDDDG);
choosing "essential only" or withdrawing consent deletes it. The
banner no longer promises audience-measurement cookies that do not
exist.
- Admin rejects an invalid company e-mail; an obfuscated stored value
falls back to the configured address so the legal notice stays valid.
- Privacy policy: Microsoft 365 as mail processor, log retention of at
most 14 days, withdrawal-function processing, consent timestamps.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
