You have to work with the capabilities of your system, many of which are able to generate 1099-INT reporting with a designated name line rather than the first line of the standard name and address setup. If you're stuck using the first line of name and address for 1099's though, you'll need to get that kid's last name into the first line.
That may mean the account lists the minor first. But be sure to retrain your staff to watch for UTMA accounts so they don't assume it's cool to pay out to the first-named individual.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8