I know you don't want them using the box, but there's really no harm to you and it's only until a new tenant is placed, then USPS will change the locks.However, you could let the post office know the unit is vacant and ask them to stop delivery to that address until a new tenant is placed.

If I had 50 people express interest I likely will get 6 to 9 people show to the open house.

However, the seller's agent expressed 'All tenants want to stay'.

Again, plenty of bad agents out there over charging and under delivery, I say good riddance to them.

Notice may be given by: (A) regular mail; (B) certified mail, return receipt requested; (C) personal delivery to any resident; (D) personal delivery at the property to any occupant over 16 years old; (E) electronic mail delivery to the email address used by the Tenant to submit the lease application.

If they sent you a registered mail change of address they will have a USPS receipt of the delivery.

I wouldn't buy existing. newark is the #1 zip code for new home deliveries under 400k this year in 2023 and is mostly being driven by DR Horton. year of year property appreciation is insane as well more than 10% on the median and average last time I checked the housing stats. if you want to build please reach out. we don't do any brokerage with existing inventory 

So unless the veteran expressed a need for special accommodations during the application process and you do not have that you should be fine.Alice- 

So far I haven't heard the Helen peeps express lower vacancy. 

This is evident when they express their goal as “ I want to own enough real estate to provide me a $10,000 per month income to replace my salary”.