How do I cancel my "Ship to Me" Printing order? QuantumPostcards Support December 04, 2017 22:16 Updated Simply call our Customer Support line at 800-637-7373 and one of our friendly representatives can assist you. Related articles How do I cancel my Direct Mail order? Can I combine On-demand Printing orders? Create your first AutoMail Client Follow-Up campaign API Feedback & Feature Requests Cancel a Social Ad Order