Of the six hopefuls to pull papers for the First Suffolk special Senate election, four have submitted signatures to the Boston Elections Department to secure a spot on the ballot in seeking for fill the seat vacated by former Sen. Linda Dorcena Forry.

State Representatives Nick Collins and Evandro Carvalho will be in the Democratic primary on April 3, having cleared the 300 certified signature threshold, according to elections officials.

Former state representative and frequent electoral face Althea Garrison handed in enough signatures to lock down a spot as an independent candidate in the May 1 election, city election officials confirmed. Donald Osgood, Sr., also an independent, also submitted signatures that were being verified Wednesday morning.

Two other Democratic candidates – Duckens Petit-Maitre and Kenny Jervis – took out papers for the special election, according to the Secretary of the Commonwealth’s office but had not submitted signatures to the Boston Elections Department by Jan. 20.

Collins and Carvalho now have office spaces in the district for their campaign headquarters: Carvalho in Mattapan, and Collins at Adams Street in Dorchester, River Street in Mattapan, and on Broadway in South Boston.