how to usa an alias at a PMB?

[Rodney Thayer <rodney@tillerman.nu>]

An identity question (and therefore, potentially relevant here...) -

once the US Post Office altered the rules to disallow pseudonymous
private post office boxes, was there a procedure documented to
get a Private Mail Box (PMB) for an alias?  I heard anecdotal evidence
you could get documentation from a publishing company as to use
of an alias for a pen name.