https://www.torn.com/sendcash.php You can see last five cash transactions made by you from here. But there is no way for you to see the logs of items sent. You can see the total number of items sent in your Personal Statistics, but you can't see what you sent and to whom did you sent. Although if given a valid reason staff can help you there, I repeat a valid reason.
To use the chain notifier, If you are on PC or using Firefox on mobile, You can use some custom userscript or extension that may be available for this purpose. TornPlus which is available for both Chrome and Firefox, has a chain notifier.
https://www.torn.com/forums.php#/p=threads&f=67&t=16055491&b=0&a=0 That is the link to the forum thread of Tornplus Extension. If you are on Mobile you can install it on Firefox, but let me warn you Firefox on android is slow as a tortoise.