Questions, bug reports and account help all go to the same place:
We aim to reply within two business days.
Open the postcard, comment or profile you want to report and use the ⋮ menu. Reports are reviewed and acted on within 24 hours. The same menus let you block a user, which hides their content from you and stops them contacting you.
Settings → Delete Account removes your account, postcards, messages and data. It is immediate and cannot be undone. Records of physical postcards you paid to have printed and mailed are kept for accounting purposes.
Postcards Premium is billed through your Apple App Store or Google Play account. Cancel or change it in your device subscription settings — Settings → Manage Subscription in the app takes you straight there.