Seller Code of Conduct

Lat updated 4/18/2021

To help create comfortable, reliable services for Buyers, we ask all vendors (here Sellers) to meet these basic requirements for each listing:


  • Be responsive: Maintain a high response rate by replying to purchase orders and service inquiries within 24 hours.
  • Accept purchase orders: Make Buyers feel welcome by reviewing purchase orders whenever you’re available.
  • Avoid cancellations: We take cancellations seriously and ask all Sellers to avoid cancelling on buyers–their business and marketing plans depend on it.
  • Maintain a high overall rating: Buyers like to know they can expect a consistent level of quality, no matter what they order.

Check your Collllor rating. Your performance is tracked against the average level of performance for all Sellers on Collllor. Listings that consistently fall below the average could be subject to penalties.



Service Quality


We strongly encourage Sellers to provide the best quality service possible, as Quality buyers tell us they consider most important for print orders.