Once a year your domain registrar will send you a notice asking you to confirm your contact information for each of your domains. It’s that time of year.
The email will normally contain a link to a web page and a code for you to copy and paste into that page. It’s important that you do what the email says, particularly the part about confirming your information.
If you don’t receive an email from your registrar in the next month, use this as your reminder to confirm that your registrar has the correct mailing and email address for you. Otherwise, your domain name could expire and one of those awful name squatters will snap it up and offer to sell it back to you for some ridiculous price.