Is there a legally mandated filing fee and/or deposit?
Trinidad and Tobago
Representation of the People Act Chapter 2:01(published 1967-12-21, last amended 2000-09-12), http://rgd.legalaffairs.gov.tt/laws2/alphabetical_list/lawspdfs2/2.01.pdf
109. (1) At the time of presenting a representationpetition or within three days afterwards the petitioner shall give security forall costs which may become payable by him to any witness summoned on his behalfor to any respondent.
(2) The security shall be—
(a) in the case of a petition relating to membership ofthe Senate or of the House of Representatives, an amount of twenty thousanddollars; and
Not specified when it comes to filing fee.