In case of offering the funeral Ṣalāĥ whilst wearing shoes, the shoes as well as the part of the earth beneath them must be pure, while, in case of offering the Ṣalāĥ placing the feet upon the shoes having taken them off, the purity of the sole of the shoes and the ground is not necessary. In reply to a question, A’lā Ḥaḍrat, Imām-e-Aĥl-e-Sunnat, Maulānā Shāĥ Imām Aḥmad Razā Khān عَـلَيْهِ رَحْمَةُ الـرَّحْمٰن says, ‘If the place was impure due to urine etc., or those who offered the Ṣalāĥ wearing such shoes whose soles were not pure, their Ṣalāĥ would not be valid. It is, therefore, safer to offer the funeral Ṣalāĥ by taking the shoes off and place the feet upon them so that the Ṣalāĥ would not be affected even if the sole of the shoes or the earth is impure.’ (Fatāwā Razawiyyaĥ, vol. 9, pp. 188)
Presence of the corpse in front is necessary. Offering funeral Ṣalāĥ in absence of the corpse is not valid. It is Mustaḥab for the Imām to stand in front of the chest of the corpse. (Durr-e-Mukhtār, vol. 3, pp. 123, 134)
Ṣalāĥ of several funerals may be offered jointly. It is optional to either place the corpses parallel such that chest of all remain in front of the Imām or place them in a queue such that the feet of the one corpse are towards head of the other and so on. (Baĥār-e-Sharī’at, vol. 1, pp. 839; ‘Ālamgīrī, vol. 1, pp. 165)