I've just dealt with it (K4IMW), but, I use my PO Box for my FCC ULS information. If the FCC or anyone else wants to get in touch with me, it's probably quicke

I've just dealt with it (K4IMW), but, I use my PO Box for my FCC ULS information. If the FCC or anyone else wants to get in touch with me, it's probably quicker to email me, but, I understand that there are times where a paper letter is more "formal," (also, QSL cards).