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Reddit holds the durable version of everything that matters to you. Your listing is a post, your negotiation is a comment thread, your confirmation is a comment, your trade count is your flair. All of that stays as long as Reddit keeps it. What expires is the working copy behind them. The privacy policy is authoritative; this page is the same facts for somebody using the app.

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What expires when

Rolling restarts every time the record is used. Fixed is set once and never extended, so an offer expires 30 days after it was made however active the negotiation was. You get no warning. Records go quietly when their clock runs out.

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What your subreddit controls

Only the two item windows, and both have a 90-day floor. An item you touched in the last 90 days is always still there. Everything else in the table is the same in every subreddit. Moderators can also switch off whether back-outs and ghosts are recorded at all. See trade rules.

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The clock on an item

Touched means edited, listed, or marked traded. Not when you added it. An item in an open trade is never deleted at any age. Deletion runs on an hourly sweep rather than the moment a clock expires, so an item outlives its window by a little. In a large subreddit a full pass takes several runs.

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What does not expire

  • Everything on Reddit. Your posts, your comments, your flair.
  • The monthly trade log. A moderators-only wiki page in your subreddit, holding ids, a date, an outcome and a link to the thread. No item names, no addresses, no prose.

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What goes sooner than its clock

  • Deleting your listing post erases its Trade Post record, its offers and its trades. Delete it only when you are done with the negotiations under it.
  • A deleted offer comment takes the offer with it, and a removal counts as a deletion. See Offers.
  • Anything you delete yourself, which is immediate rather than swept.

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If you delete your Reddit account

Reddit gives no signal when an account is deleted, so Trade Post checks and purges after a waiting period. It erases your items, your want list, your trade count, and your offer and trade indexes. Two things survive:
  1. Records of trades and offers you were in. They carry your Reddit user id and none of your content, and they expire on their own at 45 and 30 days.
  2. Lines in the monthly trade log, which live in the subreddit’s wiki rather than in the app.
Neither holds an address, a payment handle, or a phone number, because Trade Post does not store one.

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Notes

  • Storage is separate in every subreddit. Saving something in one community does not carry it to another, and moderators of one subreddit cannot see another’s.
  • There is no public reputation score and no searchable trade history. Your inventory is private and your trade history is not on display.
  • Nothing is sold, shared with advertisers, or used to train anything.
  • Trade Post does not store shipping addresses or payment handles. There is nowhere in the app to save one. Traders exchange them in Reddit messages, which Trade Post never sees. Messaging the other trader.