The easiest way to find them is to run an aged AR report. If you see a negative and a positive on the same line then you know there is an unapplied payment. Then go into the AR transactions for that matter. Filter for payments, credits and write-offs. Then just start at the top or bottom and keep using the arrows to go through the list looking for a transaction that shows an amount unallocated on the screen. 

You can then apply the payment and continue with that client or move to the next one. 

(Adding to Caren's response.)

Another way to approach this is to print an A/R Transaction Listing (select Reports > A/R Transactions). Before printing the report, open Report Entry, set the Filter Groups to A/R, go to the bottom of the list and double click on A/R Includes Unapplied Amounts, set the filter to Yes and click OK. Now print the report. 

I hope this helps.

Oooh, nice one tomhinds. Look at YOU posting in the General Discussion!!!!