The man claiming to be Bill Clinton’s illegitimate son wished the former president a Happy Father’s Day via Twitter Sunday.

Danney Williams, who tried to prove he is the son of Bill Clinton and a prostitute since 1999, used Twitter to wish Clinton a  Happy Father’s Day, asking for recognition, too. Williams, 30, was recently verified on Twitter, but has not received acknowledgment from Clinton.

Read: Twitter Reacts To Verified Danney Williams, Man Who Claims To Be Bill Clinton’s Son

“Even though you abandoned me and only took care of Chelsea, I still want to thank you for giving me life. Happy Father’s day @billclinton,” Williams tweeted Sunday. Attached to the tweet was a side-by-side comparison of both their headshots.

He also tweeted a photo set featuring the former president and himself as well as photos of Chelsea Clinton and Webb Hubbell, Hillary Clinton’s former law partner rumored to be Chelsea’s real father. 

Many of Williams’ tweets end with the hashtag #BillClintonSon. He has collected supporters who use the hashtag to appeal for Clinton to recognize his legitimacy.

In October 2016, Danney Williams’ attorneys announced their plans to take legal action against Bill Clinton to secure a paternity test for a suit they plan to file. According to the attorneys, Hillary Clinton has blocked the former president from paying child support since Williams was born.

“Today I have authorized my attorneys George v. Gates IV of New Orleans and Bruce Fein of Washington DC to file a  suit in New York where my father lives to get a judge to order a court-supervised test,” Williams said in a statement. “It is also our intention to name my stepmother, Hillary Clinton, in this action.”

Read: Who Is Danney Williams? Man Who Claims He’s Bill Clinton’s Son Wants A Paternity Test

In the same month, Williams wrote an in-depth explanation of his case on Infowars.” Williams also released a testimony explaining his story. 

“Hillary, please do not deny I exist. I am your stepson. Chelsea is my sister. And Bill is my father,” he said.

Williams held a press conference on November 1, 2016 further elaborating on his claims and his plans for the future.

During the resurgence of Williams’ crusade to be recognized as a Clinton, Matt Drudge endorsed his claims that he is Bill Clinton’s son. In 1999, one year after Drudge broke the story about Clinton’s affair with White House intern Monica Lewinsky, he debunked the allegations that Danney Williams is the son of Bill Clinton.

That same year, Star Magazine concluded the DNA match between Clinton and Williams was “not even close.” In 2016, Drudge shifted his position on the matter, publishing several articles about Williams on the Drudge Report. The reasoning behind this change of heart lies in a World Net Daily report that said “no blood sample was obtained from Clinton,” according to the former editor of Star Magazine, Phil Bunton. Bunton shifted from his 1999 claim, in which he said his magazine obtained a DNA test which proved Williams is not Clinton’s son.

However, Star Magazine never said they had a blood sample from Clinton because a partial analysis of his blood was public record in The Starr Report, Kenneth Starr’s research compilation of the Lewinsky affair. A second test would have been required to prove paternity. According to Slate in 1999, a positive paternity index would have made “President Clinton 20 to 30 times more likely than a random Caucasian male to be Danney Williams’ father,” specifying that 50,000 white men in Arkansas would obtain the same results if tested.

Read: Twitter Verifies Danney Williams, Who Claims To Be Bill Clinton's Son

Williams has requested to examine Monica Lewinsky’s famous blue dress, which he believes has been preserved with Clinton’s semen stain, in order to test paternity.

The series of tweets he sent out on Sunday were the latest installment in his quest for recognition from the man he claims is his father. At this point, no member of the Clinton family has acknowledged his claims.