I was answering out of book question. Sole proprietor is just the same. He is free to do anything which will not disrupt tax codes like overcharging depreciation above the tax department rates and in this case,
if you derecognise the asset only, there will balance sheet mismatch
if you write off the asset as a loss, and derecognise it, it is fraud as your reducing tax liability
if your you sell the asset and not pay the tax on gain, it becomes a fraud.
So, using tax as a constricting factor, it is treated as
Promotional expenses/ internal goodwill a/c
To Fixed assets a/c
here internal goodwill is like expenses incurred to generate benefits eg customer relationship development. So, he can give the asset to relatives to promote business