The original trust document of the living trust provided for the creation of a separate trust to be established upon the death of the grantor. It is not the same trust as the living trust but a separate trust. The original living trust still exists and holds the property of the grantor's surviving spouse.
I am a trustee of both trusts.
We are getting to where I suspected we might but hoped we wouldn't. The grantor had a pour-over will when he died, but it was never probated because there was no need to probate it. So even though I would be the executor of the pour-over estate, I am not since there was no probate (not even a small estate probate as allowed in NY). All the estate assets were in the trust.
It doesn't seem to me that I could deposit the check as trustee of the irrevocable trust because as both adjusterjack and zddoodah confirmed it is not property of the trust but of the grantor's non-trust estate. So if I as trustee received a check made out to the grantor, I don't see how I could deposit it anywhere.
So I think that changes it from a legal question to a financial one. Is it worth probating the estate in order to be able to deposit the check. In this case very likely not and the money will just have to go unclaimed. The only avenue I see is a possibility that I could have the check issued to the trust instead of the grantor. There is actually a very strong case for doing that. But in practice it might be more trouble than it is worth and very likely impossible to make happen. I will do some preliminary investigation though to see if there is any chance of that.
No check has been issued yet, I am just anticipating what may happen in advance. I have to decide in advance whether or not to do a whole lot of work to collect funds which may in the end amount to a check that I can't deposit.
PS the grantor has been diseased for over three years and this would be the only such check received to date. Settlement of a lawsuit in case you are wondering what the source is.