Royal Mail workers across the UK will go on strike in protest against job cuts and pay.
According to the Unite union, 2,400 managers will be working to govern between 15 and 19 July. They will also participate in strike action from 20 to 22 July.
Unite states that deliveries and certain services, such as tracked items, may be delayed during these times.
Royal Mail stated that there were no grounds for a strike, and it had contingency plans in place to minimize disruption.
Unite claims the strike is against Royal Mail's plans for cutting 700 jobs and reducing pay by as much as PS7,000.
Sharon Graham, the union's general secretary, stated that Royal Mail was "awash in cash, but it is putting profits for the few at its top before its duties as public service".
"These cuts do not focus on improving customer service in any way. They are driven solely by greed and profiteering, which have seized an essential 500-year-old service, driving it to the brink of ruin.
"Our members are determined for the business to follow a different route, and they have all the support of Unite."
Royal Mail spokesperson stated that they have contingency plans to minimize disruption to customers in the event industrial action occurs. They also promised to work hard to keep people, businesses, and the country connected.
It stated that it was committed to protecting the pay of all Royal Mail managers, and that most have seen an increase in earnings.
"We are disappointed Unite/CMA has not notified us about planned industrial action. There is no reason to take industrial action. "The spokesperson said that the extended consultation regarding our recent restructuring concluded earlier in the year and that the restructuring was complete."
Royal Mail raised first and second-class stamp prices earlier this year by 10p each to 95p and 2p each to 68p, respectively.
Royal Mail at the time warned that it was facing "significant headwinds” from rising costs. It stated it would have to reduce costs even more and increase its target to PS350m, up from PS290m.