The change marks a major improvement in customer service, allowing beneficiaries and applicants to manage their Social Security accounts at any time, day or night. Social Security remains a critical pillar for more than 60 million Americans, whose financial security often depends on timely access to the program's resources.

To qualify for Social Security spousal benefits, it's not enough to be over the minimum age of 62 while married to a worker who is collecting a retired worker benefit. You have to be married for at least one year before you can claim a spousal benefit based on your partner's work history.

The transition primarily affects a small group of beneficiaries who have not switched to electronic payment methods already, which is less than 1%, the administration wrote. Notices are being sent out to these individuals to explain the upcoming change and highlight the benefits of switching to electronic payments.