These are the samples:

• Created from JIRA UI

  A JIRA account has been created for you at:
  
     http://10.60.1.148:8080/jira
  
  This is either because an administrator has created an account for you,
  or because you have been assigned to an issue.
  
  You can change your password here:
  
     http://10.60.1.148:8080/jira/secure/ViewProfile.jspa
  
  Here are the details of your account:
  ---------------------------------------------------------------------
              Username: tchin@atlassian.com
                 Email: tchin@atlassian.com
             Full Name: tim
              Password: tim
  (You can always retrieve these via the "Forgot Password" link on the signup page)
  This action was initiated by Timothy Chin (topcat.38@gmail.com).
  

• Created from handler

  A JIRA account has been created for you at:
  
     http://10.60.1.148:8080/jira
  
  This is either because an administrator has created an account for you,
  or because you have been assigned to an issue.
  
  You can change your password here:
  
     http://10.60.1.148:8080/jira/secure/ViewProfile.jspa
  
  Here are the details of your account:
  ---------------------------------------------------------------------
              Username: tchin@atlassian.com
                 Email: tchin@atlassian.com
             Full Name: Timothy Chin
              Password: 71icT6
  (You can always retrieve these via the "Forgot Password" link on the signup page)
  This action was initiated by null (null).
  

Both email templates use the usercreated.vm template which has this line:

$i18n.getText("template.user.initiatedby", $initiatingUser.fullName, $initiatingUser.email)