Yes, the ID card of the postal currency card can be updated on the mobile phone after it expires.

To sum up:

With the development of science and technology, many traditional banking services can be completed online, which provides great convenience for users. With regard to the expired ID card of postal savings card, users no longer need to go to the bank counter to update information in person, but can do it through the mobile banking application.

Using mobile banking to update ID card information not only saves users' time, but also reduces the transportation cost to the bank. In addition, mobile banking applications usually have strict security measures to ensure the safety of users' personal information.

Although mobile banking provides convenient services, users still need to pay attention to some matters when using it. First of all, you must download official and genuine applications to prevent personal information from being stolen. Secondly, when updating ID card information, ensure the security of network environment and avoid using unsafe network environment such as public Wi-Fi. Finally, after the update, users are advised to check the information to ensure accuracy.

Updating ID card information through mobile banking is not only convenient and quick, but also in line with the development trend of modern financial services. More and more banks and other financial institutions are strengthening their online service capabilities to meet the growing needs of customers.

Legal basis:

According to article 13 of the electronic signature law of People's Republic of China (PRC), an electronic signature that meets the following conditions shall be regarded as reliable:

1. When electronic signature production data is used for electronic signature, it belongs exclusively to the electronic signer;

2. When signing, the electronic signature production data is only controlled by the electronic signer;

3. Any changes to the electronic signature after signing can be found;

4. Any changes to the content and form of the data message after signature can be found.

When users update their ID card information in mobile banking, they usually need electronic signature confirmation. According to the above legal provisions, as long as the electronic signature meets the relevant conditions, it is regarded as a reliable electronic signature and has the same legal effect as a handwritten signature or seal. Therefore, when users use mobile banking to update their ID card information, their operation is protected by law.