I don't think it is possible - and while I myself cannot take personal offence (as I'm white) - I do know that there are many POC who have voiced concerns and called out those identifying as Transracial.

I also read a really cool article about how the term trans racial used to refer to someone who was one race, but grew up living with another.

Okay - found it again! Here

They also make good points on why transracial, as it's used here, is wrong.