Originally Posted by Yin7676
accountsservice / query and manipulate user account information- shared libraries
It would be useful if we knew which version of the package your package manager is trying to install. Anyway, according to your profile you're running the latest release of Linux Mint, which is based on Ubuntu (unless you're running LMDE, which was based on Debian testing but recently switched to stable). The latest Ubuntu release is "Vivid Vervet", and like previous versions it includes this package, which apparently is also included in Linux Mint:
According to the Ubuntu change log, the package was updated last time on 18 November 2014 (build 10), in order to "get debug symbols on all architectures":
Ubuntu Changelog for package "accountsservice"
This, on the other hand, is the change log from Debian. The package was updated last time on 28 July 2014:
Debian Changelog for package "accountsservice"
If you have just installed Linux Mint for the first time, the package manager will probably try to update all packages for which it can find, on the official repository, a newer build than the one included in the original release. So don't worry, that's the way it works. If you don't trust Linux Mint, Ubuntu or Debian, then all you have to do is to switch to another distribution which you trust.
Btw, welcome to LQ!