Tag agency question for north Broward

My mom and I both renewed our decals online a month ago. Mine arrived pretty fast from PBC, but hers, which is registered in Broward, never did. I called the county and they said to email form 83146 and a DL. I'd prefer not to with (1) the security risks of emailing her DL and (2) since they already screwed up once, I'd like to 100% make sure they receive the form.

I'm thinking of going to the Deerfield tag agency, if not Coral Springs or Ft. Lauderdale. I've never been to one, only the (God forbid) DMV. Does anyone have a recommendation for a specific location and/or a specific time/date to go? It's non-urgent, so if Thursdays or Fridays are bad days, I can wait until next week. TIA.

Side question & edit: If anyone can let us know if the bottom part of the form has to be completed, it'd be greatly appreciated. I assume it doesn't since the decal was lost in transit and she's not voluntarily giving up something. I'm asking because I'm going without her (she'll be at work whatever time I go), and I won't have her decal to give to the agency. TIA again.