all non-cash contributions of non-cash items of over $500 must be reported on form 8283. I assume the mutual fund is a publicly traded security. most Vanguard funds are listed on one or more American exchanges so they would be publically traded. thus they get reported in schedule a part of the 8283. you should have gotten an acknowledgment from Vanguard for the contribution. it's required in case the IRS were ever to inquire.
