check in
verb
Definitions
To announce or record one's own arrival at a hotel, airport etc.
Example: We got to the hotel last night and checked in at the front desk.
To verify a person's information and record their arrival, such as at a hotel, airport, etc.
Example: The clerk checked us in at the front desk.
To contact another person in order to keep the other person informed of one's situation.
Example: Kelly has to check in with her parole officer today.
To return (a book to a library, source code to a repository, etc.).