There are many factors that can cause account linkage:
Registration information
IP address and network environment
Account password
Merchandise information
FBA shipment information
Contact information
And so on
These are the factors that Amazon can detect, and the information that Amazon will record. Amazon will be recorded in the information, Amazon will be through the comprehensive judgment of this information to determine whether the Amazon seller is the same person multi-account operation, to determine whether or not the association.