What happens if our account is over the submission limit?

Hello, I am in the midst of upgrading my Jotform to a paid plan. While on the free plan, I received 2 payments, which is more than the 1 free I am entitled to per month. Before I upgrade, if someone tries to make submission/payment, will it be rejected? How do I know if someone has tried to make a submission before I upgrade? Will it still be captured by Jotform?

Thank you for the clarification.

MingYang

If the account is over limit for more than a day, all forms will be disabled until it is no longer over its limits.  Users will see a form disabled message instead of the form and would not be able to fill out the form.