How to retain qualified rows？

[phoebe_90]

sheet 1

Document Number	Account	Amount in local currency	Cost Center
19000902	24508210	1348.16
19000902	65010000	-1348.16	709536
19000917	24508210	14350.17
19000917	65010000	-14350.17	709536
19000917	65010000	285.71	709536

Only keep rows when the volume of "Document Number"=2

For example

Document Number	Account	Amount in local currency	Cost Center
19000902	24508210	1348.16
19000902	65010000	-1348.16	709536

[FinnCharlton]

Hi @phoebe_90 , this workflow will do that for you: