Answer:
Certificate of Deposits.
Step-by-step explanation:
Certificate of Deposits (CDs) as defined in the question, are time based deposits that are usually issued by banks, credit unions and other money-centered financial firms.
Because it is time based, the CDs are short to medium term and they pay higher interests than the regular saving accounts. Also CDs have low returns and low risk involved.
CDs can be done by individuals by simply walking into his/her bank and pledging to have a certain amount saved for a certain period of time. The bank then pledges to pay you more interest than you would normally get on a regular savings account and a document to that effect is written signed by both parties.
CDs are insured federally and as such returns are sure.
Cheers.