The appellant, G4S Cash Solutions (SA) (Pty) Ltd, provided cash management services to the respondents under written agreements concluded in 2005 and 2006. The agreements contained a liability and risk clause, including a time-limitation clause (clause 9.9) requiring claims to be notified within three months and summons issued within 12 months of the event. In April 2010 and March 2011, the respondents were defrauded by unknown third parties who impersonated G4S employees using copied uniforms, vehicles, identification cards and procedures, and collected large sums of cash from the respondents’ premises. In one instance, a G4S call centre erroneously confirmed the impersonator’s identity. The respondents sued G4S in delict for damages, alleging wrongful and grossly negligent conduct in failing to prevent impersonation and failing to warn of known risks. G4S raised a special plea that the claims were time-barred under clause 9.9 because summons was served more than 12 months after the incidents.