transactions – How to verify the person receives lightning fee?

I’m engaged on a facet undertaking to permit customers to obtain some funds from it. When a person clicks a button to withdraw to a lightning handle, my webapp makes a request to the host of that lightning handle and makes a fee.

I can see the transaction has completed and all the pieces is okay.

However I face conditions when folks say they did not obtain something though the logs present that it ought to have been acquired and all settled.

I do know it may be some shady customers truly receiving funds however claiming they did not to attempt to get extra from me. Then again, it may be that customers have some technical points or lack of expertise utilizing lightning they usually actually did not obtain something.

So, I can’t say with confidence when it is a case with fraud and when it is actually some points on their facet.

Is there a solution to shield and to know if customers attempt to cheat on me or in the event that they need assistance?