(someone’s) records

“Records” are the important documents that people keep for future reference. They are not personal; they are often for banking, medical history, and other boring but necessary parts of life. A person’s records could be on paper or on the computer. 

A: Do you remember when your last appointment was?

B: I don’t; I’d have to check my records.

You might want to hold onto this for your records.

This phrase appears in these lessons: