Just to be clear:
If you want it to not be alimony, put that clearly in writing in the settlement agreement. The payment will be treated as a property settlement pursuant to a divorce, and is not taxable to the recipient and is not deductible to the payor.
If you want it to be alimony, then it would be deductible by the payor and taxable to the recipient. You should have the situation reviewed by your own expert, because there is a chance it might be disallowed as alimony. And, because of the large amount paid as a lump sum, there could be tax disadvantages for both parties (e.g. not be fully deductible to the payor, and would push the recipient into a higher tax bracket that could have a ripple effect on social security, medicare premiums, and other things).
