“Although usually sought by employers, either party may apply to a tribunal for an order that the other party pay a deposit as a condition of continuing to argue a particular matter if the tribunal is satisfied that the contentions put forward by that party have ‘little reasonable prospects of success’: Rule 20(1) of Schedule 1 of the Employment Tribunals (Constitution and Rules of Procedure) Regulations 2004.”
No. 5 Chambers, 6th June 2013
Source: www.no5.com