"He does not have enough $$ in the account for the account trustee"

Which Account is this, and which trustee is this, and what is the trustee needing money for, that isn't available elsewhere? Too many pronouns and not enough direct specifics to follow.

How old is he? Is he still working for that employer, who has their 401(k) plan administered by Fidelity?

If this is an IRA fee, why would you owe a fee when there is "not enough money?"