When you do not have the full name of the occupant can you just call him/her UNLAWFUL OCCUPANT?

I have an example where only the 1st and 2nd respondents are fully named as parties, but then the 3rd respondent is all the unknown "unlawful occupants" together.

So my question is then if we only have ONE UNLAWFUL occupant and we have no details of the person as to full names and ID, can we just put APPLICANT so and so, against "unlawful OCCUPANT"?