Related Clues:
- Endorsements on a passport
- Needed for international tour, sometimes
- Travel documents required by some countries
- Passport documents
- Passport stamps, perhaps
- Frequent flyers' documents
- Official endorsements
- Authorisations of dad's frolics?
- International papers?
- Stamps for travelers
- Stamps on passports
- H-1B and B-1, for two
- Certain work permits
- Travelers’ needs, at times
- Permits required to see such timeless scenes