@Apples521 

Then, posting to RE, as you originally suggested, is probably the proper entry in this case (debit A/R, credit RE for the 3 payments). Alternatively, you can create an invoice for the customer with a service item mapped to RE. That does the exact same thing as a JE that debits A/R and credits RE. JEs don't show on all reports and bypass cash vs. accrual reporting.