When mailing initial I-129F packet, is sending it via Registered mail acceptable?

[J / A 0]

After compiling my I-129F packet for the last couples weeks with all necessary items, I finally sent it off to the Dallas dropbox. However I had a very bad feeling in my stomach upon pulling out of the post office parking lot. I remember reading it was best to send it with confirmation of arrival and while I was in the post office thought to myself "better send this via Registered Mail" to be safe. The reasoning for the bad feeling in my stomach was that Registered mail requires a signature on their end in order to receive the packet. If nobody is there to sign it, it will be taken to a post office and will sit there until somebody claims it via signature. Now this worries me as it is after all a P.O. box I am sending it to. After putting many weeks of stress and hard work making sure I had everything perfect, I would hate for it to get there only to be bounced back since nobody signed for it. Am I wrong for my worrying here or have others sent it via Registered mail without any issues?

If anyone can sooth my worrying head, that would be great!

Kind regards,

- JP

[payxibka 10,045]

it can be sent registered mail but is not needed... sending it priority with delivery confirmation does essentially the same thing for a lesser cost