| Role | Name | Name (original language) | Name (translation) | Floruits |
|---|---|---|---|---|
| Addressor | Innocent III, pope (d.1216) | Pope Innocent III | 1198 × 1216 | |
| Addressee | Walter of St Albans, bishop of Glasgow (d.1232) | bishop of Glasgow | 1194 × 1232 | |
| named person (transaction) | Walter, bearer of papal letter | Walter, bearer of this letter |