Section 35

Where in a possession claim against trespassers, the claim has been issued against "persons unknown", the claim,
particulars of claim, any witness statements, exhibits and any other relevant document shall be deemed served on
those persons by –
(a) Attaching copies of the claim form, particulars of claim and any other relevant document to the main
door or some other part of the premises so that they are clearly visible;
(b) if practicable, inserting copies of those documents in a sealed transparent envelope addressed to "the
occupiers" through the door or gate of the premises or letter box if there is one; or
(c) Placing stakes in the land in places where they are clearly visible and attaching to each stake copies of the
claim form, particulars of claim and any other relevant document in a sealed transparent envelope addressed
to "the occupiers".