Create a useful list by checking the printed denomination and serial, then choosing “Save on this device” beside the result. Each entry stores both fields. The same serial under another denomination remains a different entry; an exact duplicate is combined. Saving records what you entered, not an assertion that you own a winning bond.
Open My Bonds to inspect the list before running “Check saved numbers.” Check the denomination labels as well as the digits. The tool processes the saved list in small groups against a consistent publication. If the publication changes during the run, the old answers are withdrawn and you should run a fresh check. Read each group’s coverage, including any unavailable game.
Use the remove button beside an entry to delete that entry. “Delete all saved numbers” asks you to confirm before removing the full local list. Deleting or importing entries cancels a pending saved-list check so answers for an older list do not reappear. This does not erase a backup file you previously downloaded; manage that file separately.
Choose “Export backup” before clearing browser data, changing devices or leaving the beta domain. The JSON file contains the denomination and serial pairs you saved, so keep it private. “Import backup” validates the file and merges valid entries with the existing list. It does not upload the file. Invalid files are rejected without replacing the previous list; the limit is 2,000 entries.
Browser storage belongs to a particular origin. A list saved on staging.irmumtaz.com does not automatically appear on irmumtaz.com, another browser or another device. Export from the beta and import on the destination you intend to use. Check a few entries after import and delete unneeded copies when the move is complete.
Local does not mean encrypted or permanently recoverable. Another person using the same browser profile can see the list. Private mode, blocked storage, a full quota or damaged data can prevent saving. The page reports a failure rather than claiming success; the ordinary checker remains available. Keep a private backup if the list matters to you. There is no cloud recovery or account sync in this beta.
Sources to verify current requirements
These are official starting points, not a claim that every current rule has already been reviewed.