Suspicions were raised in court that Jamie Malcolm Ferbrache, 27, had absconded to the UK.
He had denied attempting to import cannabis resin into Guernsey, failing to provide his mobile phone passcode when required and possessing class C drugs, but was found guilty at trial in November.
He had been bailed to appear in the Royal Court yesterday, but did not attend.
Crown Advocate Chris Dunford said the Guernsey Border Agency had become aware that Ferbrache had become engaged to his partner on Christmas Day.
She lives in Manchester and there is no record of her travelling to the island.
However, there is a record of someone with Ferbrache’s brother’s name flying out of the island shortly after the Royal Court trial and this is believed to have been the defendant.
Lt-Bailiff Russell Finch said he was surprised that Ferbrache had not been picked up if he had left the island, especially considering there were many fewer people travelling.
An arrest warrant without bail was issued.