Guernsey social security details sent to wrong addresses
Personal details of some Guernsey residents have accidentally been sent to other islanders.
About 10 people have contacted the Social Security Department to report getting someone else's quarterly statement as well as their own.
It related to people who received self-employed or non-employed cards.
The details on the letters were the person's full name, address, social security number and earnings for the last quarter.
Chief officer Malcolm Nutley said: "I'm not confident it's the end of the story I strongly suspect there are more."
He said the issue had been traced to a technical issue and "regrettably" the failure of checks to be carried out.
A department spokesman said the technical problem was with the automatic posting equipment and meant "in a small number of cases" people would receive another person's contribution card in the same envelope as their own.
The spokesman said: "It's a bad mistake and we apologise unreservedly."
Mr Nutley said "it's a very great concern" and he did not know why checks to ensure the number of envelopes equalled the number of letters were not carried out, but he intended to find out why.