A deliberate gap in an otherwise adopted code
Massachusetts has adopted the Uniform Probate Code broadly. But it specifically did not adopt the Uniform Multiple-Person Accounts Act — the section of the Code most other states have used to create an automatic statutory presumption that a joint bank account passes to the surviving owner. This is a genuinely significant gap, since most states following UPC-style statutes give the surviving account holder at least a rebuttable presumption of ownership just from the account's joint titling.
Gift principles govern instead
Without that presumption, Massachusetts falls back on ordinary common-law gift principles. Whether a non-contributing joint owner actually receives the account funds turns on whether the original owner genuinely intended to make a present gift of a joint interest in the account — not simply on how the account happened to be titled at the bank. Two names on an account, by itself, doesn't automatically answer the ownership question the way it would in most other states.
The convenience account problem
This gap matters enormously in a very common real-world scenario: an aging parent adds an adult child's name to a bank account purely so the child can help pay bills, write checks, or manage day-to-day transactions — not because the parent intended to give the child a real ownership share. Massachusetts calls this a convenience account, and it's a well-recognized category in Massachusetts probate litigation specifically because the state lacks the automatic presumption other states have.
The case that confirmed it
A Massachusetts Appeals Court decision, McLaughlin v. O'Brien (2020), addressed this directly: where a joint account is created merely as a matter of convenience, the naming of the additional account holder does not manifest an intent to make a present gift. In practice, this means a family member added to an account purely for convenience purposes may not automatically inherit that account's balance just because their name was on it — the funds can instead be treated as part of the original owner's probate estate, distributed under their will or by intestacy.
Why this makes account documentation matter more in Massachusetts
Because Massachusetts doesn't hand the surviving account holder an automatic statutory presumption, clear, contemporaneous evidence of the original owner's actual intent becomes especially important here. Anyone genuinely intending to make a present gift of a joint account interest — rather than just adding a name for convenience — benefits from documenting that intent clearly, since a Massachusetts court reviewing the account after death has less built-in statutory support to lean on than courts in most other states would.
P.O.D. designations, life insurance, and retirement accounts
A payable-on-death (P.O.D.) beneficiary designation works differently from joint ownership between co-owners, since it doesn't depend on the same gift-intent analysis — the named P.O.D. beneficiary simply receives whatever remains once the owner dies. Life insurance and retirement accounts like a 401(k) or IRA follow the same basic rule — the named beneficiary receives the asset directly, outside probate, as long as they're alive when the owner dies, and it only becomes part of the probate estate if no beneficiary was ever named or every named beneficiary predeceased the owner with no contingent beneficiary in place.