What is the process of registering a foreign marriage at an Amphur in Thailand and retaining the original marriage certificate?

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I’d like to ask for advice from those who have registered a foreign marriage in Thailand and obtained Kor Ror 22 at a district office (Amphur).

I’ve heard that some Amphurs keep the original foreign marriage certificate, while others only keep a certified copy. We only have one original document, so I’m a bit concerned.

Does anyone have recent experience with an Amphur that did not retain the original and accepted copies instead?

I understand that procedures can vary by district and may change over time — just hoping to learn from others’ experiences to choose the best option.

Thank you so much in advance!