An Post management are to be asked to appear before an Oireachtas Committee to explain their proposal to end door-to-door postal delivery.
The Chairman of the Oireachtas Communications Committee, Noel O'Flynn, said he wanted assurances from the company that those who could not collect their post from outside their homes would be catered for.
Deputy O'Flynn said the Committee was also concerned about the security of the proposed outdoor letter boxes, which will be installed outside homes.
An Post has said that the scheme would speed up deliveries and could eventually save the company €35m a year.
Tenders have already been invited for the supply of 500,000 new letterboxes.
However, a decision on whether or not the plan can go ahead will be made by the Communications Regulator.
A spokesman for An Post, John Foley, has denied suggestions that the change would deal a blow to rural areas.
The Rural Affairs Minister said it would be a great tragedy if people from rural areas had to travel long distances to collect their mail.
Éamon Ó Cuív said he had opposed a similar proposal some years ago and that he would be discussing the latest plan with the Communications Minister.
Fine Gael spokesperson for Community and Rural Affairs, Fergus O'Dowd, said the proposal to end door-to-door postal deliveries in rural areas would be a severe blow to the elderly, the disabled, and the sick.
