Who contacts Sponsor for Family Visit Visa

[SharePo]

Hi Seniors.

When we apply for Family visit visa and sponsor get contacted by Home office, I would like to know is the ECO office calls himself or somone else calls on his behalf?

Thank you

[Route to ILR]

Hi Seniors.

When we apply for Family visit visa and sponsor get contacted by Home office, I would like to know is the ECO office calls himself or somone else calls on his behalf?

Thank you

Someone from UKVI Sheffield on behalf of ECO.