Code 428: examination or appeals case transfer.
From IRS Document 6209, the IRS's processing codes manual.
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Document 6209 says
Used on individual (IMF) accounts.
Examination or Appeals Case Transfer
The full Document 6209 entry, as printed
I/B/ E Examination or Appeals Case Transfer Generated Transaction Updates the AIMS Control Number D.O. or SC Code on unreversed TC 420 or 424. Does not post to the IMF or BMF as a transaction. Generated when an Examination or Appeals Division case transfer is entered on the AIMS terminal. Contains the DO or SC code to which the case is being transferred. CC 89 allows refund & credit elect but prevents offset.
After code 428
Not enough shared timelines with this code yet. The block fills in once 30 people with code 428 share theirs from the result page.
Crowd figures, not IRS data. They describe what happened to others, not a promise.
Questions people ask
What does code 428 mean on my IRS transcript?
Document 6209 calls it "Examination or Appeals Case Transfer".
Sources
Checked against these sources on October 30, 2026.