I-129F FIling/Mailing Address Question

[Jude and Fiorella 0]

Hello everyone! I am ever so close to sending away my I-129F, but I had one nagging question. I see in the guide it recommends that the packet be sent via USPS; however, on all my documents I have the mailing address for FedEX and UPS (aka NOT the Dallas Lockbox one) If it send it with FedEX or UPS and NOT USPS what kind of difference will this make? Thanks!

[jkelly07 120]

usps goes to uscis- p/o box660151 dallas tx 75266----express mail or fedex, or ups, or courier service,goes to uscis attn;1-129f 2501 south state highway 121 busines suite 400 lewisville tx 75067-- fedex and ups don't deliver to p/o boxes,

[Jude and Fiorella 0]

Right. My question is does it make a difference with whom you send it? This site seems to recommend USPS. I was wondering if perhaps it was faster than FedEX/UPS or if there was some reason they preferred it.

thanks for your reply