TOKYO (REUTERS) - Sharp Corp's list of liabilities that prompted Taiwan's Foxconn to suspend signing a takeover deal was an unverified study of worst-case scenario risks, rather than liabilities requiring disclosure, a source briefed on the matter said.

The list, sent to Foxconn on Wednesday (Feb 23), included previously undisclosed potential liabilities worth around 300 billion yen (S$3.73 billion), prompting Foxconn founder and billionaire Terry Gou to hold off signing the estimated US$5.8 billion deal, separate sources have said.

Reuters was unable to ascertain why the list was sent to Foxconn, formally known as Hon Hai Precision Industry Co. Top Sharp officials had not examined the list and had not planned to share it with Foxconn, the source told Reuters on Saturday, declining to be identified because of the sensitivity of the matter.

The items included unlikely events or risks, and the amount was far higher than contingent liabilities that require disclosure, the source added, without elaborating.

Sharp declined to comment. It said in a statement on Friday that it has been properly disclosing its contingent liabilities, which stood at around 80 billion yen as of end-2015.

Foxconn agreed with Sharp late on Friday to extend a deadline for the takeover talks by one or two weeks beyond Monday's planned expiry, another source said.

In a statement on Monday (Feb 29), Sharp said it had no set deadline for sealing a deal. It added that it aimed for a deal "as soon as possible".

Shares in Sharp were down 3 per cent in morning trade, bucking a rise in the broader Tokyo market. The stock has lost a quarter of its value since Wednesday's close.

If Sharp and Foxconn overcome the latest hitch and sign a deal, it would be the largest acquisition by a foreign company in Japan's insular technology sector.