You cannot join Freemasonry twice. Once a Mason, you are a Mason for life — until you decide to quit.
This principle, known as Masonic continuity, is one of the oldest in the Craft. The obligations you take at the altar are not temporary memberships. They are lifelong bonds. You do not un-become a Mason any more than you un-become a brother to your siblings. The relationship may grow distant, but the tie itself is indissoluble.
However, you can switch lodges — and many Masons do. A man who moves to a new city, who finds his original lodge dormant, or who simply seeks a different working environment may petition another lodge for affiliation. The process requires that he abide by the values and commitments of the desired lodge, present his demit (a certificate of good standing from his original lodge), and undergo whatever examination the new lodge requires.
Benjamin Franklin moved between lodges with ease — from St. John’s in Philadelphia to lodges in France during his diplomatic service. Mozart, initiated in Vienna, later affiliated with lodges in Prague and Berlin as his musical career carried him across Europe. Neither man “rejoined” Freemasonry. They simply carried their Masonry with them, as every Mason does, wherever the path leads.
To quit Freemasonry is a solemn matter — not forbidden, but not undertaken lightly. The obligations remain in the heart long after the dues stop and the attendance fades. A man who has knelt at the altar has been changed by the experience, whether he acknowledges it or not.