Definition
Transaction Code 520. Indicates a bankruptcy or litigation hold. The IRS is prohibited from collecting while the bankruptcy stay is in effect. TC-520 tolls the CSED for the duration of the bankruptcy plus 6 months.
What it means for a resolution case
Collection is stayed and the CSED is tolled. Coordinate with bankruptcy counsel before CNC, IA, or levy-release work.
Related codes
Where RESO uses it
Core Discovery reads these postings from Account transcripts and surfaces them as findings — not as a raw code list. The ledger stays Tier IRS. Client memory does not overwrite it.