Hello and thank you for using Just Answer. The Stimulus Payment distributed is by the taxpayer last two digits of their Social Security Number. Taxpayer with last two digits between 00-20 will receive the payment by 9 May 2008 if there 2007 federal tax return was direct deposit. The last two digits between 21-75 will receive their payment by 16 May 2008. The last two digits between 76-99 will receive their payment by 23 May 2008.