| Subject | English | Japanese |
| law | acknowledgment of claim | 請求の認諾 |
| law | acknowledgment of paternity | 認知 (にんち) |
| comp., MS | acknowledgment required | 受信確認要 (A field in the header of a Status-Control message. If a Status-Control request has acknowledgment required (ACKRQD) set in the message header, the recipient must supply a Status-Control response before the sender sends further messages or further Status-Control requests) |
| gen. | n written acknowledgment of debt | 借用証書 (しやくようしょうしょ) |
| gen. | n written acknowledgment of debt | 借用書 (しゃくようしょ) |