It is possible that Undercove is referring to a specific situation in a specific Yeshiva that may in fact be doing something incorrect. But his generalization “Any Yehiva…” is then mis-applied.
Even his subsequent explanation was rather incredulous. I can’t imagine any Yeshiva that admits people without making any financial arrangements at the beginning of the year. So if the parent are in financial hardship and have in fact ‘paid all they can’, how does that compare with whatever arrangement they agreed to with the Yeshiva? Did they lie to the Yeshiva and agree to pay an amount that they had no intention of honoring?
Or perhaps they encountered a financial hardship later in the year, and now cannot pay what they agreed to? In that case, they should contact the Yeshiva and renegotiate the terms.
Although there are surely many exceptions, all of the Yeshivas, Schools, and Camps that I have dealt with in my 25 years as a parent of seven children have been run by decent humans who may have a tough policy but ultimately will negotiate if there is a legitimate need.
The only Admission Cards I have ever heard of were included or referred to in the initial Admission process for the first day of the school year. Some schools don’t have the ‘Admission Card’ policy at all. Some reference it but never ask for them on the first day. And most important of all – some schools have them, BUT if you call them and make proper arrangements, whether your balance is paid up or not, they will agree to send them to you. They have no interest in actually following up their threat. All they want if you to make arrangements or discuss your balance.