IF AND Formula not working as expected

=IF(AND(A12="9599",F12="Linkjoping"),"YES","NO")

I have used the above formula and in the specified cells they do contain these values - however, the result is always 'NO'?

Try

=IF(AND(A12=9599,F12="Linkjoping"),"YES","NO")

i.e, A12 is NOT text but formatted as GENERAL or NUMBER

Try
=IF(AND(A12=9599,F12="Linkjoping"),"YES","NO")

Thanks both