The following formula is fine until I add the the third IF referencing cell
AE2. Cell AE2 has a formula and when it equals #N/A I want my formula to
return "delinquency"

=IF(X2=DATEVALUE("27/08/2005"),IF(X2<=DATEVALUE("26/09/2006"),IF(ISNUMBER(AE2),"xx","delinquency")))

Thank you for your help,

Esther