(1) A writ shall contain an indorsement of claim.
(2) The indorsement of claim shall be—
(a) a statement of claim; or
(b) a statement sufficient to give with reasonable particularity notice of the nature of the claim and the cause thereof and of the relief or remedy sought in the proceeding.
(3) An indorsement of claim on a writ shall constitute a statement of claim if, but only if, it is headed "Statement of Claim".