An example of this is when a corporation, say a small cell phone company, incorporates penalties in their contracts that require additional fees for collections of a late payment.

Seems like lack of communication is the theme here (that would drive me crazy as I tend to over communicate with my TK folks in Memphis:))In today’s age of cell, email, video there’s no reason not to have all the info you request and require...

I'm making flyers and signs and I don't want to use my personal cell phone number.

The Consumer Reports Jan 2014 issue features cell phones and plans.

The cheapest option I can think of would be a hotspot on your cell phone plan.

The setup will look like this:        A               B1      P0         ($100,000)2      P1         $7,0003      P2         $7,0004      P3         $7,000 .....to end of yearsThen you simply put in the IRR equation in to a cell:  =IRR(B1:B4) or wherever the cash flow ends.  

You will find their personal name, company name, and cell phone number.

Also cell phone reception.2.  

. :-) I like that I can also control the thermostat, arm/disarm the alarm (and clear accidental fire alarms) remotely on my cell phone.

I do a lot of scheduling maintenance and contact with tenants from wherever I am... thank goodness for the internet and cell phones!