More than 1,200 people have signed petitions opposing the closure of the South West Sheffield postal delivery office on Ecclesall Road.
Royal Mail is discussing proposals to move the services offered at the site near Banner Cross to the delivery office on Pond Street in the city centre.
The organisation has blamed the move on increased competition from other carriers, and a general decline in the posting of letters.
Resident Steph Gale, who set up the petition, said: “If the Royal Mail do decide to close the sorting office, all staff, letters and parcels will be transferred to the office in Pond Street. This will affect a lot of people in a negative way.”
The cause has been taken up by Ecclesall Liberal Democrat Councillors Shaffaq Mohammed and Roger Davison, and Sheffield Hallam MP Nick Clegg. They have organised another petition, while a third has been launched by local Labour Party members.
A motion has also been tabled at Wednesday’s full council meeting by Lib Dem councillors.
Plans to close the office because of health and safety fears caused by postmen having to park their vans in a bus lane were mooted, but later dropped, a decade ago.
Ronit Wolfson, a spokeswoman for Royal Mail, said it was ‘exploring options’ for relocating the office to Pond Street but that ‘no final decision’ had been made.
“As a commercial business, we are operating in a market where letters are in structural decline and where there is competition. We expect that any move will have a minimal impact on our customers.
“This is part of Royal Mail’s ongoing transformation of its business and work to increase the efficiency of its operation as well as providing delivery offices which are fit for purpose for staff and customers.”
Ms Wolfson added: “Whenever a delivery office move goes ahead, we always consider alternative parcel pick-up facilities and offer our customers alternative means of receiving undelivered mail, including delivery to a designated neighbour, re-delivery to the addressee, to another local address specified by the customer, six days a week.
“We operate an open and honest policy with our people and we are currently in discussions about this proposal with them and our trade unions.”
There will be no compulsory redundancies and ‘detailed planning to ensure a smooth transition’ will take place if the move goes ahead, she said.