Answer:
I recommend you stick to the requirements provided on page 4 of the form W-9, which indicates that for a valid trust you must obtain the name and TIN of the legal entity. If the attorney obtains a letter from the IRS stating that the trust may use the grantor's SSN instead of obtaining its own TIN, you can accept the SSN. Otherwise, I believe you should stick to your guns and require that an TIN be used.
First published on BankersOnline.com 6/02/08