Mole, director of an egg incubator, hires Rat as an employee, who soon begins to steal and muddy the waters. A social satire about poorly-managed organizations, based on caricatures by Boris Yefimov.
Unfortunately the movie The Signature Is Illegible is not yet available on HBO Max.
| Directing | Aleksandr V. Ivanov | Director |
| Writing | Leonid Lench | Writer |
| Directing | Lev Pozdneyev | Co-Director |
| Art | Igor Znamenskiy | Art Direction |
| Art | Valentin Lalayants | Art Direction |
| Art | Boris Efimov | Art Direction |
| Sound | Nikita Bogoslovskiy | Original Music Composer |
| Camera | Nikolay Voinov | Director of Photography |
| Sound | Nikolay Prilutskiy | Sound Director |
| Editing | Valentina Ivanova | Editor |
| Directing | F. Goldshteyn | Assistant Director |
| Visual Effects | Faina Epifanova | Animation |
| Visual Effects | Dmitriy Belov | Animation |
| Visual Effects | Elizaveta Komova | Animation |
| Visual Effects | Roman Davydov | Animation |
| Visual Effects | Lidiya Reztsova | Animation |
| Visual Effects | Kirill Malyantovich | Animation |
| Visual Effects | Tatyana Fyodorova | Animation |
| Visual Effects | Boris Stepantsev | Animation |
| Visual Effects | Vladimir Pekar | Animation |
| Visual Effects | Sergey Stepanov | Animation |
| Art | Galina Nevzorova | Background Designer |
| Art | Pyotr Korobaev | Background Designer |
| Art | Irina Troyanova | Background Designer |
| Art | Vera Valeryanova | Background Designer |
| Art | I. Prokofyeva | Background Designer |
| Art | Olga Gemmerling | Background Designer |