Businesses are often operated jointly by spouses, but all earnings for self-employment
purposes may have been reported by only one spouse, frequently spouse one. Partnership
determinations in these instances are complicated because that certain outward signs
of the spousal relationship are similar to the indications of a partnership. Spouses
may have jointly operated a business without considering themselves partners because
they did not operate under a written partnership agreement. This does not preclude
a finding of partnership for Social Security purposes.