Do I need a lease for a year to obtain a residency certificate for a Non-O A visa in Thailand?

5555 if you save your fees not to hire someone for your visa process you end up in more crap and the other people will use that opportunity to make money .

It's better to hire someone to do it for you Don't be thrifty spend one time and the next renewal is easy for you so need our service let us know thanks 👍

I would say until you buy just keep a copy of current lease handy. Of course you should have TM 30 also.

Usually you just need to take the receipt from your landlord showing they have filed a TM30 for you

That's up to your immigration office. It's not a common requirement, but each immigration office sets their own requirements. That's at least 1 office for every province in Thailand.