Ruling on the worker paying the buyers' debt to the owner if they do not pay

This is a letter from the listener Hasan Sati, a Sudanese resident in Saudi Arabia. He says in his letter: I was working as a grocery store employee with one of the men, and a person bought some goods on credit, and the grocery store owner knew about it. The debtor promised to pay the debt when it became easy for him. I took an annual leave to my hometown, and during that time, the grocery store owner demanded the debt from the debtor. The debtor denied it and said that he had not borrowed anything from the grocery store. He took advantage of my absence, and when I returned from my leave, I found that the borrowing man had left the area permanently. The grocery store owner then demanded that I pay the amount owed by the man.
Has the debt that the man denied become my responsibility, and is it permissible for us to split the amount between us, considering that the grocery store owner had knowledge of the debt? Please inform us, may Allah reward you?
Answer: This requires detail: If the grocery store owner gave you permission to sell to people on credit, if he gave you permission and allowed you to do this, there is no blame on you. However, you must still prove the debt. If you did not... and did not prove it in a ledger or with witnesses, you are liable for the money; because you were negligent.
And if he did not give you permission to sell to anyone on credit, you are also liable for the money.
As for if he gave you permission, there is nothing wrong with you, but you must prove the debt, either with witnesses or in writing. He should write it on himself and you should take his signature so that he does not deceive you, and so that the money is not lost. If you did not have witnesses for it or did not write it down, or if the grocery store owner did not give you permission to sell to people on credit, then you are liable for this money.
And if there remains a difficulty, the court will look into your case. If there is a difficulty and something other than what was mentioned, the court will look into the matter. And Allah is the Helper. Yes.