Squeezing IPs out of ARIN

[admin () thecpaneladmin com]

Anyone have any tips for getting IPs from ARIN? For an end-user 
allocation they are requesting that we provide customer names for 
existing allocations, which is information that will take a while to 
obtain. They are insisting that this is standard process and something 
that everyone does when requesting IPs.  Has anyone actually had to do 
this?