Hello, my wife is the administrator of her late father, who passed away 2 year ago. His death was too sudden, without a word left for his family. Since uncleared about his legacy, my wife checked around banks and found little documents. The legacy only a house (which with shared names with another 3 siblings), little money in one bank and an old car. My wife submitted the relevant documents to Jabatan Tanah and managed to transfer all the assets to her mother in last year.

However, my wife received a lawyer letter about chasing outstanding payment about RM 60k from a company (XXX Sdn Bhd). This is too sudden and we've checked all ways, found that her late father's company (Tan Ah Kau Enterprise) seems like bought some goods before.

From the DO, invoice and statement, we notice that some variances.
- some DO were not signed/received by her late father, we doubt it could be forgery, signed by workers or some unknown people.
- some DO dates and invoices are not tally. For eg. Invoice issued date is earlier that DO issued date.
- some DO only was stated her late father's name (Tan Ah Kau), but the invoice for the particular DO was stated Tan Ah Kau Enterprise

From the above situation and findings, we would like to know.
a. if those DO and invoices are solid proof?
b. do we need to admit those amount?
c. what if we don't admit and what we can do?
d. any better suggestion/solution for this kind of issue?

We truly appreciate you can provide some legal advice for us, as we really stuck now.

Thank you so much