Ending your property lease soon? What you need to know

I didn't have such a clause in my two rental contracts in Singapore (of which I wrote one myself - all the four other rentals and numerous subtenancies I had in Singapore were without written contract, only verbal agreement) and never had any problem.
It is common sense that on moving out you need to repair any damage and clean any dirt you caused. Doing that, and a good relationship between tenant and landlord (based on mutual trust and goodwill) is a better guarantee for no or few problems than any written contract (which is anyway difficult to enforce under Singapore law!).
Of course most property agents will tell you otherwise - that's why I generally avoid them and advice anybody else to do so too!

Hi Beppi, I don't think any landlord will want to rent out the property without a written contract. Under the law, the tenancy needs to be stamped and reported to IRAs and the tenant will get a fine if stamp duty is not paid. Do take note of this.
Hope this information is helpful.

As far as I know, subtenancies (i.e. renting a room, not a whole unit) do not need to be stamped.
For others, it may be legally required, but not always done (my experience). I paid stamp duty only once (the landlady wanted it), and even then only for the first two years - a subsequent renewal was done without.
Of course you can find such flexible arrangements only without agent. That's why I advise everybody to avoid them!

Renting a room, is not required a stamp duty as PUB bill will be under the name of owner of the house or who has taken the whole unit as rent. But, yes in some cases there is an one page agreement between tenant and owner. But when you need to rent a full unit, then stamp duty is must and PUB has to transfer under your name. And, HDB does show in its public domain stating that one unit recently transacted in block XYZ at S$ xyz price (without informing the unit number, tenant or owner name).