The rule doesn't requires that you collect it. It requires that you include it in the order if you obtain it. And it requires that it stay with the order if the order is handled by multiple parties.
There are some participants in the web of wire transfer parties who require the information, and failing to have it in an order could cause delays until it is provided.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8