The Alliance assembly member (MLA) Michelle Guy said she was meeting Royal Mail on Tuesday.
Guy told BBC News NI: “I’ve been hearing from people for months now on this issue, it got particularly acute now after Christmas.”
The Lagan Valley MLA added that she was “overwhelmed” with responses when she asked constituents about the scale of the issue.
She said people were not receiving “vital correspondence” such as hospital appointments and banks cards and it was “having a real impact on people’s lives”.
“Having a postal service is not a luxury, it’s an expectation that we all have and right now, it’s not working.”
She said she will be challenging Royal Mail on their “service standards”.
“We’re past the time for answers and excuses, we’re actually at the stage where we need to see action.
“We can’t have people coming off waiting lists for hospital treatment.”
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‘ Some details of this article were extracted from the following source www.bbc.co.uk ’
