German customs officials have ordered Justin Bieber to settle an unpaid bill over his pet monkey or face a penalty upon his return to the country.

Back in March, the international pop star ran into trouble with customs authorities in Germany when he was caught attempting to take his pet capuchin, Malley, into the country without the proper paperwork.

Border officers took the monkey into quarantine, however Bieber failed to return to claim the animal, so Malley was donated to a wildlife park.

Officials at Germany's Federal Agency for Nature Conservation have now accused Bieber of failing to pay for the primate's care while awaiting collection and they have issued a public notice demanding the singer settles his bill.

According to the Associated Press, Bieber is said to owe around $1,500 in fees and a spokesman for the organization has insisted he will be in trouble next time he enters the country. He also reportedly faces a bill of around $6,498 from customs officials.

The 19 year-old singer bought a new pet monkey to replace Malley after returning to the U.S.