/usr/bin/scp-dbus-service is in system-config-printer-common 1.5.11-1ubuntu2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 | #!/bin/sh
prefix=/usr
exec ${prefix}/share/system-config-printer/scp-dbus-service.py "$@"
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