The chief executive of An Post has said that EU customs rules are "anti-postal" and have caused delays in moving parcels from the UK into Ireland at an indirect cost to the company of up to €8m this year.
Mark McRedmond said that since the UK left the EU, domestic post is encountering real problems. He said that people do not know the rules and fail to fill in the right paperwork before sending items to Ireland.
Mr McRedmond said that the UK post office has not put in place rules and systems to deal with the EU rules, which will not become mandatory across the EU until 2022.
This means that customers in the UK are not being asked to pay charges and fill in paperwork in their local post office, which means the items posted cannot be released