Do I need to file a new TM30 every time I re-enter Thailand?

TM30 question.

So I’ve been renting an apartment since January and have been coming in and out of Thailand using the 30 visa on arrival + 30 day extension.

Do I need a new TM30 each time I re-enter or does the first one suffice? If i do need a new one each time, who should do it, me or my landlord.

To tell you the truth I’ve actually lost the original one done back in January, luckily they've never asked for it when I’ve gone to extend my visa (I’ve extended it twice so far)

I’m in Chiang Mai.

Thanks :-)