The body of Paul Bennett, 45, from Worsley, Greater Manchester, was discovered behind a Chinese restaurant in the early hours of Sunday morning.
Greater Manchester Police are not treating his death as suspicious, but believe that it may have been drug related.
Last month, Wigan Magistrates court heard how Bennett had been spotted rubbing himself against the post box with his trousers down, before raising his arms in a star position, shouting ‘wow’.
He pleaded guilty to two charges of indecent exposure as well as using threatening and abusive words and abusive behaviour.
Bennett received a 12-month community order with a compulsory alcohol treatment and supervision programme.
He was also ordered to sign the sex offenders’ register and pay £260 in victim compensation and court costs.
Paying tribute, an acquaintance of Mr Bennett said: ‘He had his troubles but he wasn’t a bad lad’.