Instead he received a 12-week suspended sentence and community service.
The Zimbabwe-born boxer will carry out the punishment as he prepares for his on-off fight with Wladimir Klitschko in Germany on April 30.
Chisora, unbeaten in 14 bouts, said: “I’m the people’s champ, I don’t mind doing community service.
“I’m going to local boxing gyms, I’m going to old people’s homes, I’ve told them I’ll do anything. I think they shouldn’t send people to prison — people should give back to the community.
“It won’t faze me, I don’t complain, I don’t care what it is.”
Chisora feared his big chance had gone when IBF, WBO and IBO champion Klitschko withdrew four days before their original December 11 date with an abdominal tear.
The bout was resurrected after negotiations for a unification fight between the Klitschko camp and WBA king David Haye collapsed.
Chisora’s promoter Frank Warren blasted Haye’s manager Adam Booth calling him “the most difficult man I’ve had to deal with in boxing”.
Warren said: “It didn’t surprise me when Haye-Klitschko didn’t happen.
“Dereck’s contract had a get-out clause for Klitschko but thankfully Haye and Booth made it easy for them to make their decision.
“It is a huge opportunity for Dereck and I really do have a lot of faith in him.”
Warren is backing Del Boy to cause a bigger shock than when Leon Spinks dethroned Muhammad Ali in 1978 and Buster Douglas after he stunned the previously unbeaten Mike Tyson 12 years later.
The SunSport columnist said: “It would be a bigger upset than Spinks beating Ali because Spinks came in as an Olympic champion.
“If confidence can win a fight Dereck’s going to become heavyweight champion of the world.”
Chisora, who spent US$63 906 on his training camp for the postponed fight, added: “The delay will make no difference to me although it might to Klitschko.
“I think he took me for granted last time so I expect him to be better prepared, but I was ready last time and I’ll be even better this time.”