A more thorough explanation:

Express notice, also known as actual notice, is when someone is directly informed of something through a written document or verbally. This means that the person has specific knowledge of the fact or proceeding.

For example, if a tenant provides their landlord with written notice that they plan on moving out at the end of their lease, the landlord cannot claim that they did not have knowledge of the tenant's plans. This is because the tenant provided express notice to the landlord of their intention to move out.

Another example of express notice is when a company sends a letter to a customer informing them of changes to their account. The customer has received express notice of the changes and cannot claim ignorance of the new policies.

Express notice is important because it ensures that all parties involved have clear and direct communication about important information. It helps to prevent misunderstandings and disputes that can arise from lack of knowledge or miscommunication.