Time to get a PO Box...
Yep, to be safe. Although I suspect the $500/month will be paid via a debit card similar to food stamps.
A PO Box is a good idea. I have one at a local UPS store. All my mail goes there. Plus, unlike USPS, the UPS Store will accept packages for me and sends me an email when I get one. Cost is about $14/month. Good deal.