I am preparing a Form1041 for a deceased taxpayer for which there are 10 beneficiaries. 7 of the 10 beneficiary's refuse to give their SSN. due to in fighting.

The attorney and I have tried everything but to no avail. Some have suggested I use "requested" in the field for SSN.  I happened to be on the phone with the practitioners hotline on another issue and asked about remedies.to this one.. After being juggled around departments I got somebody who said the IRS does not advise or give guidance as this is technical . She went onto say it was up to my industry (CPA's) to decide what to do but if I failed to provide SSN's I could personally be held responsible for preparer penalties. Has anyone run into this? Does anyone have any advice?