Lohan insists her tardiness was down to an honest mistake and she has thanked Coroner's office staff for helping to make sure she isn't late again on Friday (21Oct11).
In a post on Twitter.com, the actress writes, ""I'm sorry for the confusion that I may of caused (sic) to those at the Coroner's office. Won't happen again, now I know where to go! Thank you for your help.""
The Mean Girls actress was ordered to serve time at the County Morgue on Wednesday (19Oct11) after a Los Angeles judge frowned on her attempts to complete 360 hours at the city's Downtown Women's Center - community service she was handed earlier this year (11) as part of her probation following a shoplifting conviction.
It emerged last week (ends14Oct11) that bosses at the centre had terminated Lohan's arrangement because she had only completed a fraction of her required shifts.
The star's probation was ultimately revoked during a progress report hearing on Wednesday (19Oct11) and Judge Stephanie Sautner ordered Lohan to complete 16 hours at the Los Angeles County Morgue before her next court date on 2 November (11).
She was led out of the courtroom in handcuffs but posted $100,000 (£62,500) bail and walked free less than an hour later.
The actress was expected to begin her first day of community service at the County Morgue at 8am local time on Thursday and her assistant called ahead to alert staff members the star was on her way, but she arrived late and was turned away at the door.
Lohan's publicist has since released a statement, insisting the star's tardiness was based on ""a combination of not knowing what entrance to go through and confusion caused by the media waiting for her arrival"".
Lohan admits the trials and tribulations of the past 24 hours have been a lot to take in. She tweets, ""With all of the stress and pressure from yesterday and today, I've never been so happy to go to therapy!!!!""