Ref. No. 935
In the name of Allah the most Gracious the most Merciful
The answer to your question is as follows:
If it is feared that doing istinja while standing or using hand-showers water will spoil your cloths then using toilet papers is permissible. Nevertheless, if one is compelled to such a situation, he should be very carefull while using commode toilets.
And Allah knows best
Darul Uloom Waqf Deoband