What should I do if I scratched the ceramic floor in a rental home and could not reach the landlord to ask for forgiveness, and is giving charity with the intention of it reaching him sufficient?

The tenant is trustworthy (Ameen) and is not liable for what is damaged in the leased property unless it was due to his transgression (ta'addi) or negligence (tafreett). If the damage occurred without transgression or negligence on his part, then he is not liable. However, if the damage was caused by his negligence or transgression, he must guarantee it and deliver it to the owner. Donating it as charity is not sufficient unless there is no hope of reaching the owner.