- - Contents Forms PS Form 3227-R Revision: Rural or Highway Contract Route Carrier Stamp Purchase Order Form Effective January 2024, the Postal Service™ revised PS Form 3227-R, Rural or Highway Contract R..." /> - - Contents Forms PS Form 3227-R Revision: Rural or Highway Contract Route Carrier Stamp Purchase Order Form Effective January 2024, the Postal Service™ revised PS Form 3227-R, Rural or Highway Contract R..." />