samename

There is so many incorrect posts on here.
A) You only use a PO box when you use USPS. The address is 2501 S. State Hwy 121, Business Suite 400, Lewisville, TX 75067.
B) The thread about the Vermont office proves nothing as she didn't actually go there, nor is it the same office. Look at the place on Google Maps, you can easily walk into the building, in Suite 400 out of who knows how many.
C) He didn't actually deliver it there, they made him mail it.
Did he give it to them after he put postage on it, or did he give it to them to mail?
I'd be more worried about him not following the directions than whether he was telling the truth. If he were lying, would he really say that they would not accept it and made him put it in an envelope and put postage on it? That is not something I would 'make up', those are consequences of not following instructions.

Just submit the evidence that they specifically ask.
Be aware, that submitting documents showing the giving of money could be a two-edged sword. It could be interpreted as giving money to support a spouse, not a fiance, and could result in a denial.
Good luck on your visa journey.

NOT TRUE PLEASE,............. do not say what you dont know

No, it's here in California and Texas.
One friend called in California and was told by San Bernadino Sherrifs that they couldn't compel him to vacate his residence.
I personally called in Texas and was told by the slack jawed yokel local Costabulary basically the same thing. I'v eseen it also on Cops hence my understadning.
On the other hand, in Nigeria for $20 they will not only help you get her out but will also put her in jail for making them have to come out.