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Andrew Durham was injured in a job-related accident that resulted in a workers' compensation settlement agreement with the employer's insurance carrier, Traveler's Indemnity Company. The settlement agreement required Traveler's to pay Durham $2,500 per month for the rest of his life. To finance its obligation, Traveler's purchased an annuity in its name. The settlement agreement required Traveler's approval or written consent prior to an assignment of the annuity payments. Durham later decided to open a business and went to a credit union for a $214,000 loan. The credit union loaned the money, taking a security interest in Durham's monthly annuity payments. Traveler's consent was never secured. Discuss the conditions in which a right may not be assigned and assess if this was a valid assignment.