Blueprint or Validation Rules for Invoices in Zoho Books

Blueprint or Validation Rules for Invoices in Zoho Books

Can I implement Blueprint or Validation Rules for Invoices in Zoho Books?

Example, use case could be,  Agent confirms from client that payment is done, but bank only syncs transactions tomorrow. in this case, Agent can update invoice status to done, and the next day he can add record payment from synced banking transaction.

I could find Blueprint and Validation Rule for Custom Modules in Zoho Books but not for built in ones.

is there's not then what workaround would you recommend?