According to what the C.G. told me, the name of a documented vessel doesn't necessarily have to appear on the transom, but it's got to be visible at all times.
Since Neeltje's bulbous butt is split in two by her oversized rudder, I opted to put her name on the cockpit walls, and her hailing port on either side of said rudder (Palatka / Florida) after her re-paint, and nobody's complained about it yet.
As far as hailing a bridge or marina is concerned, I started our maiden trip up the I.C.W. from Dania beach hailing them as "This is the Dutch Tjalk Neeltje", but after a days worth of bridges and marinas had consistently answered, "Sorry, we don't speak Greek, please repeat", I eventually switched to:
"This is the 64-foot wooden shoe with a telephone pole in the middle, coming your way from the South."
If nothing else, it avoided the bridge tenders from confusing me with any comparably sized Donzi or Cigarette in the area...
PS - WifeyB: Even with that outdated pink bikini, you don't look a day over 39...