Expense PO receipt should not be allowed during GL Period Closure activity

Summary:

Expense PO receipt should not be allowed during GL Period Closure activity

Content (required):

In our organization, all POs are Expense type and No inventory stock is maintained. In this case, we do not have Costing Period.

Now the issue is that when Finance team is in process of Period closure (which takes around 10 days), they do not want any PO receipt should happen in the system. However, system does not provide any control on receipt creation based on GL Period status.

We believe it's a very common period closure scenario for any organization.

Kindly suggest how to achieve this.