I reproduced this behaviour on precise, deleting all keys found with apt-key list:
$ apt-get source hello Reading package lists... Done Building dependency tree Reading state information... Done Skipping already downloaded file 'hello_2.7-2.dsc' Skipping already downloaded file 'hello_2.7.orig.tar.gz' Skipping already downloaded file 'hello_2.7-2.debian.tar.gz' Need to get 0 B of source archives. gpgv: Signature made Thu 04 Aug 2011 01:11:39 PM CEST using RSA key ID 9F1B8B32 gpgv: Can't check signature: public key not found dpkg-source: warning: failed to verify signature on ./hello_2.7-2.dsc dpkg-source: info: extracting hello in hello-2.7 dpkg-source: info: unpacking hello_2.7.orig.tar.gz dpkg-source: info: unpacking hello_2.7-2.debian.tar.gz dpkg-source: info: applying 01-no-usr-share-info-dir-gz ** Changed in: apt (Ubuntu) Status: New => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/939322 Title: apt-get source ignores missing key To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/939322/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs