everytime you ban someone from a HM server you are expected to fill out a forum which is located Here

The format of it will be like this:

GUID -
NAME -
REASON -
ENFORCED BY -
DURATION -
DATE -

For Example:

GUID - efa2cb823cd038f4fa46415405334db7
NAME - Lol
REASON - Swearing And Abuse
ENFORCED BY - [HM] Matt
DURATION - Perm
DATE - 17 Feb 09

SIDENOTE: If You Do not know their GUID then go into AGrcon and than click on the "PunkBuster" Tab

-Matt