The pro-independence party is struggling to survive after its leader Kenny MacAskill announced last month it could not afford to contest the Holyrood election in May.
MacAskill also revealed claims of “financial irregularities” had been reported to the police and that taking part in the Scottish Parliament election on May 7 is “simply beyond our resources”.
The party was launched by Salmond in 2021 but has yet to win a single election.
The £50,000 was spent on flights between 2022 and 2024, according to a former member of the party’s finance and audit committee.
An Alba source is said to have told the Record: “Kenny MacAskill was chair of the Alba party finance and audit committee for four years and he didn’t once raise concerns about party expenditure on high spend areas, such as travel costs, to the wider membership or to the national executive committee.
“Notwithstanding that, he inherited a party that was debt free, that had made a small profit, and knew fine well what party funds were being spent on.
“To have been happy with spending at the time, to now claiming the party can’t fight the election, as he’s only just realised that he’s presided over a blackhole, is absurd.
“He must commit to fighting the election so others can start to raise the vital election funds the party needs.”