From Longman Dictionary of Contemporary Englishin personin personPERSONALLY/YOURSELFif you do something in person, you go somewhere and do it yourself, instead of doing something by letter, asking someone else to do it etc You have to sign for it in person. → person
Examples from the Corpus
in person• You can apply for a visa by mail, but it's quicker if you go to the embassy in person.• My letters were all returned to me, so I decided to go around to her house in person.• The prince was renowned for his bravery, and chose to lead his troops in person. 