[Phoenix]

Found this:
For female plaintiffs acting without any male plaintiff:

SFP (single female plaintiff), indicating one woman submitting a pleading alone
JFP (joint female plaintiff), indicating more than one woman submitting a pleading, though not groups of women, such as abbesses, representing institutions – these are treated as corporate body plaintiffs (see below)

For group plaintiffs:

CBP (corporate body plaintiff), covering abbeys, colleges, companies and other institutions
UBP (unincorporate body plaintiff), covering churchwardens, overseers of the poor and representatives of tenants or copyholders