Cash vans to be pulled off the road during strike
Up to €100,000 was stolen in two separate cash robberies in Tallaght and Finglas in Dublin on one day last month.
"The risk would be too great if gardaí are not operating," said a banking source in relation to cash transfers.
G4S, which has a nationwide network, 200 vehicles and over 600 staff, will be among the companies most affected.
The company provides cash transportation in high-security vehicles and cash management services, including secure storage and the sorting of notes for ATMs.
John Campbell, managing director of Cash Solutions Ireland, a division of G4S, told the Irish Independent: "Due to the planned withdrawal of service by An Garda Síochána on successive Fridays in November, G4S has been in contact with customers to tell them that it will not be able to provide cash delivery and collection services on those days. We will be working with customers to mitigate the impact of this decision where possible, and in the interests of the safety and security of our staff, our branch network will be placed in a lockdown state with enhanced security measures in place."
Now that the Garda Representative Association has rejected the Government's deal, a full-scale contingency plan is set to swing into action.
Speculation that the army may be deployed onto the streets has been dismissed by senior Government sources but the Defence Forces will be on stand-by in case of a major incident.
The Department of Justice is also holding discussions with the airport and port authorities aimed at keeping routes into and out of the country open.
Passport controls at Terminal One in Dublin are civilianised and would not be affected to the same extent by the strike action.
The airport police service, which patrols in and around terminals, is not part of An Garda Síochána.
The Garda National Immigration Bureau operates passport controls at Dublin Airport's Terminal Two, as well as in Cork and Shannon airports and Dún Laoghaire and Rosslare ferry ports.
Court sittings are also likely to be severely disrupted.