If you have successfully completed your comprehensive exams, you are allowed to put the abbreviation ABD which stands for "All But Dissertation". Once you are awarded your doctorate, you are permitted to put DBA, behind your name.
Some use PhD(c)
The abbreviation for candidate is 'C.' followed by the person's name who is running for election. Cand is also an acronym for candidate.
"candidate"
A candidate is the name of the person who runs for the office
If you are certified: CPhT Otherwize: PhT
Candidate.
The candidate is the name for the person running for office. Many times the people know little or nothing about the candidate who is running for office.
MEd candidate means a person is in the process of obtaining their Masters of Education degree.
Golf
"M" in front of a person's name is usually an abbreviation of their first name. M. Night Shaymalan, for example, uses the abbreviation because his actual first name is difficult to pronounce.
If you mean behind a person's name it means Private Investigator. If you are referring to math PI=3.14159265359 ...
In Baptist Churches practising adult baptism, the person being baptised is usually referred to as a candidate.