Mandotary column issue and column, field binding

sns 9,231 Reputation points
2020-08-25T10:35:23.413+00:00

Two issues:

Though column marked as mandatory, even we don't fill that respective column in a form is able to submit successfully. what could be the cause? please help

second one,

once "company code" and "type of payment" entered respective code should appear. Please refer below screenshot ( marked with black one is second requirement)
20271-capture.png

SharePoint Server Management
SharePoint Server Management
SharePoint Server: A family of Microsoft on-premises document management and storage systems.Management: The act or process of organizing, handling, directing or controlling something.
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