• What exactly is this field for?
  • What format is the "tag" supposed to be in?
  • Does the recipient see it? Does this info survive a snapshot?

1 Answer 1


It just adds an user-defined tag to your transaction.


It contains 27 trytes (=uppercase ABCDEFGHIJKLMNOPQRSTUVWXYZ and the number 9)

  • If you enter "MY9CUSTOM9TAG" the actual tag will be MY9CUSTOM9TAG99999999999999
  • If you leave the field empty, the tag will be 999999999999999999999999999

  • The recipient sees it.
  • It can be viewed in Tangle explorers (like thetangle.org)
  • It does not survive snapshots but you can still look at it in Tangle explorers that support viewing transactions before snapshots

Current usage

  • If you want to quickly find your transaction you can add a tag (e.g. BRENT9BUTLER) to your transactions and search by tag in a Tangle explorer
  • You can leave friendly messages with your transfers
  • 1
    To add to current usage: attaching a customer reference or similar can work well
    – Jon Story
    Nov 28, 2017 at 21:04

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