Traditionally, the order references generated by OMS for orders created using the Ordering API 2.1 have been 10 characters long. However, as volumes increase so does the chance that two orders will have colliding references.

To combat this, any new companies created since the 6th March will use longer 16 character reference codes to reduce the chance of collisions.

Long order references can be turned off in company settings should it cause any issues with third party websites who expect the reference to be a certain length.

Longer references for orders have already been in use in other parts of the system for around 6 months.