Buying a new LG G6

Hello,

  I've come across a great deal from an LG G6, brand spanking new. Have called Fido to check the IMEI and it's good. 

  My only concern is about the blacklist. If this person does not make their payment, will Fido blacklist the phone?

  I know that a customer can call and report a device as lost/stolen and said device would be blacklisted. However, it is sort of unclear as to what happens when phones and accounts become cancelled due to non-payment. 

Thank You

***Edited to add labels***