| LS | Title | From | To | Approval date |
| SG5-LS173 | LS/r on Draft Recommendation ITU-T Y.blockchain-terms (reply to SG20-LS162) | SG5 | SG20; | 2020-10-23 |
| SG20-LS162 | LS on draft Recommendation ITU-T Y.blockchain-terms | SG20 | SG2; SG3; SG5; SG9; SG11; SG12; SG13; SG15; SG16; SG17; | 2020-07-16 |