As a result of a visa / accounting office mistake (about which I posted on this site before) I have now overstayed.If I go to immigration at the airport and pay the overstaying fine of 20000 baht will there afterwards be any record of this overstaying at all?

I need to afterwards go to another country to get a non immigrant visa with which to get a marriage visa in Thailand,will my having overstayed affect this?Thanks.

Yes, there will be record of the overstay.

With or without an overstay record, you are unlikely to get a non-O visa for the purpose of travelling to Thailand to get married there. A tourist visa would fit that purpose.

Yes.

You need to be married already to get a non 'O' visa based on marriage but the overstay will not affect you getting any visa.

The overstay will have no effect on getting a single entry non-o visa that you will need to apply for an extension of stay (it is not a visa) based upon marriage. I assume you are already married.

The overstay will have no effect on getting a single entry non-o visa that you will need to apply for an extension of stay (it is not a visa) based upon marriage. I assume you are already married.

Yes I am already married,

Sorry 2 more questions just to get it all straight:

So the overstay won't have any effect on getting the single entry non o visa AND ALSO not on getting the marriage visa afterwards,is that correct?

You recommended Vietiane(Laos) as a good place to get the non O visa at the moment,is Penang ok too?

Thanks for all the info Ubonjoe,it is much appreciated.

The overstay will have no effect on getting a visa or an extension of stay.

Penang will also do a single entry non-o without a problem.