Hello, I have just got a new passport so my passport number is different to the one that is on my vaccine certificate, what should I do when applying for the thailand pass?

Go see your primary care physician. Just get it re-issued with the correct information.  Why take chances when you can nip it in the bud....

 

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The passport number is not that big of a problem. If you name and date of birth is correct that will be enough.

Some vaccine certificates do not have a passport number on them. Most issued in other countries do not have a passport number on them.

4 hours ago, flyingtlger said:

Go see your primary care physician. Just get it re-issued with the correct information. 

Apparently you are writing about another country than Thailand.

The certificates here are issued by the Ministry Of Public Health not a physician.

A troll post using a trolling meme has been removed.

It will not be a problem. I returned last month on a new passport. Vaccine papers with old passport number. No issues with Thailand pass or at any checkpoint.