Funny stuff happens around compiling the Electoral Register.
People can even find themselves off it after being on it for years.
Every so often a short window opens - this is when you can check and make sure you still have your right to vote recognised.
In Focus - Department of the Environment, Community & Local Government
The official publicity misleadingly refers to 25 November. The last date for receipt of corrections or new applications is the day before that - 24 November. Watch out for that.
The new register will decide who gets to vote for instance on the civil marriage equality referendum due next year.