Chesterfield residents are being asked to check that the details held by Chesterfield Borough Council on the electoral register are correct.
Each household will receive a form with the details on it. Residents should check the details and return the form to the council or by visiting www.registerbyinternet.com/chesterfield.
Anyone who is not registered will not be able to vote in the elections for the next police and crime commissioner in Derbyshire, which will be held next May.
Huw Bowen, Chesterfield Borough Council’s electoral registration officer, said: "Anyone that wants to vote must be registered. To make sure you are able to have your say at the elections next year, simply check the form when it arrives and return it as promptly as possible.
"If you’re not currently registered, we’ll send you information explaining how to do this or you can just go online to apply to register at www.gov.uk/register-to-vote."
It is particularly important that anyone who has moved address recently looks out for the form and checks whether they are registered.
Research by the independent Electoral Commission indicates that people who have moved house recently are far less likely to be registered than those that have lived at the same address for a long time.
Kay Jenkins, head of English regions at the Electoral Commission, added: "The annual canvass is an opportunity for people to easily check whether they’re registered. It’s essential for a healthy democracy that everyone who is entitled to vote is able to, and for those who need to, registering is now easier than ever with the online system of registration."
"If you have changed address in the last year, it’s particularly likely that you will need to register at your new address, so check the form as soon as it arrives."
Any residents who have any questions can contact the elections team at Chesterfield Borough Council, email firstname.lastname@example.org or call 01246 345 402.