These payments are known as "waves."
" The payments that are being provided on December 21 represent the second payment from the SSA this month.
According to the SSA, these payments are meant for Social Security claimants who were born between the 11th and 20th of a given month.
The amount of money that recipients of these checks will get may vary depending on a number of different circumstances.
A person must have retired at the age of 70 to earn the maximum payment of $4,194.
Those who retired at the age of 62 are only eligible to collect as much as $2,364 per month as their maximum payout.