Identify the decision behind the item
An object may remain because someone values it, because its owner is unclear, or because removing it seems irreversible. Ask which reason applies before proposing a donation. A souvenir that matters to a partner deserves a different conversation from an ordinary kitchen tool neither person remembers buying.
Give a meaningful keepsake an actual place
When both people are unsure, give the item a temporary home and agree on a review date. Do not discard another person's possessions during the trial. If the object belongs to a relative, ask that person what they want before deciding its future as a household.
If the household wants to keep the object, decide whether it should be displayed, protected in storage, or offered back to its owner. “Keep the family plate in the labeled cabinet” resolves more than “put it back for now.” The decision can honor its meaning without reserving an entire shelf for uncertainty.
Use a review date without a disposal deadline
For an uncertain item, agree on a temporary location and a time to talk again. Do not make silence equal permission to throw it away. If nobody remembers the owner, ask the relevant relative or housemate first. A small box of unresolved objects is manageable when the household knows what question is still open.