When would you configure an ASA to do peer-id-validate no check

Can't think of a good reason to use "no check", especially if using pre-shared-keys.
Cisco web site of little help, but I'm sure there's a reason.  What am I missing?
jimmycherAsked:
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alienXenoCommented:

a few things from off top of my head and bookmarks :)   :

 Sometimes IPSEC tunnels between IOS/PIX and ASA are resolved by removing peer-id-validate nocheck by issuing simple  peer-id-validate nocheck .

Also , if you are using certs and dynamic tunnels to the ASA from clients, you may need 'no check''.
When configuring  VPN tunnel group parameters for digital signature authentication , the identity of the remote access VPN clients should be validated using the peer-id-validate cert command

you can also  check this http://onlinestudylist.com/archives/ccie_security/2011-August/027592.html where discussion is about a situation requiring peer-id-validate no check.

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jimmycherAuthor Commented:
Many thanks for the reponse and the link
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