Accounts receivable are invoices the business has issued to customers that have not been paid yet. Accrued revenue represents money the business has earned but has not yet invoiced to the customer.
Deposits from customers are prepaid revenues because the business receives payment before providing any products or services. The deposit is credited to the accounts receivable account until it becomes collectible.
Historical Cost Principle - Assets recorded at the actual cost at the time of acquisition, remains the cost on the book as long as owns by an entity.
*No adjustments are made for changes in the market value of the asset. (Ex. Actual Cost: 2,100 in 1995, current market value: 127,000).