Verafast = jerks and criminals.
There's no need to verify anything.
On the next call, I will be sending 10,000 volts down the phone line to verify that their phone is connected, then go to their homes (for those still alive) and wash their outside windows at 2:00AM - just to verify that their windows are clean, then walk into their bedrooms to verify that they're asleep and getting their full 8 hours of sleep.... It's my free Phone Line, Window, and Sleep verification service.

I zinged 'em.
Finally decided to answer the phone after weeks of calls.
Yelled into the phone, "xxxx xxx!!"
Girl said "Hello?"
I replied "Don't call me again, you xxxxxx xxxx", and hung up.
Yes, I was viscious - and I had every right to be: They're criminals.
We'll see how it goes.
If it continues, I'm contacting the state Attorney General. I've done it before...
But I like my "quick and direct" method better.

This number has called twice in the last two days.  I didn't answer it and don't intend to. I'm also on the Do Not Call List so I'm peeved that they are free to call whenever they want.

Don't erase the calls from your Caller-ID unit. You may need the dates and times of the calls for documentation.

Contact your state Attorney General's Office or some federal office of "telephone harrassment". I've done it with other cases.

These criminals must be stopped.

(My approach was a bit different in this case. What I said to the girl from Verafast was so awful that she probably quit the same day. It's too bad. The innocent take the brunt of our wrath. But if we all do this, it will cause a high turnover of personnel, and they won't be able to retain any competent and experienced staff. They'll have to turn to the dregs of society to fill these jobs, which won't work, and the whole criminal operation will slowly grind to a halt.)

Got calls from this number for four consecutive days.  I didn't answer the calls as I dont know anyone from WA.