Simplify the following text for a Grade 6 native English-speaking person.
Original: Post-nominal letters , also called post-nominal initials or post-nominal titles or designatory letters are letters placed after the name of a person to indicate that the individual holds a position , educational degree , accreditation , office , or honor . An individual may use several different sets of post-nominal letters .
Simplified: Post-nominal letters are letters after a persons name .