The UK Bible Students Website
Scripture references are to the King James (Authorised) Version
Answer: Yes. There are at least three evidences from Scripture to show that Paul was not only an Apostle, but that after the death of Judas he became the twelfth.
3. After Judas lost his ʻbishopricʼ, the remaining eleven Apostles believed (correctly) that it was necessary to make up the number to twelve.
The narrative in Acts 1: 20-26 describes their good-faith effort to nominate a replacement Apostle through chance – a sort of sanctified lottery.
In this they showed their correct understanding that there must be twelve, but sought to accomplish this in their own way and in the wrong way, for only God could elect an Apostle.
The eleven Apostles had not yet received the outpouring of the holy spirit at Pentecost, and thus did not have sufficient discernment to understand their error; they ran ahead of God, not ʻwaiting for the promise of the Fatherʼ (Acts 1: 4).
Their gamble on Matthias was misguided, proven by the fact that he virtually disappeared from New Testament history. Not so with St. Paul, who through God's deliberate selection became the chief contributor to the writings of the New Testament, ample evidence of his Apostleship.
October 2014. The usual author rights are asserted, except that you are free to reproduce this article. Please acknowledge the source.