Is the funeral prayer acceptable if the rows are not straightened or if people stand randomly?

The funeral prayer is not invalidated by the unevenness of the rows, but straightening them is a Sunnah that should not be abandoned. The Hanbalis believe that the prayer of one who prays alone behind a row without an excuse is not valid, whether in the funeral prayer or other prayers. Therefore, one should avoid praying alone behind a row if a space is available.