In the list of things needed for the non-O marriage, it mentions:
To visit as the relative of a Thai national, the applicant must show documents
proving such a relationship.
Step 1 – Online e-Visa Application:
Complete the online e-Visa Application at https://thaievisa.go.th/and upload the
following documents in PDF or JPG formats:
1. Photo taken with a light color background with a full- face view of the person
without wearing a hat or dark glasses and covering up shoulders
2. Photo taken while holding passport with a light color background with a full- face
view of the person without wearing a hat or dark glasses and covering up shoulders
3. A copy of Passport (must not expire within 6 months)
4. Proof financial showing monthly income minimum 40,000 Baht (for last two
month) or Bank balance 400,000 Baht
5. The applicant must present a valid and effective marriage certificate and a copy
of the spouse’s Thai Passport or Thai National I.D. card. Fiancés are not included in
this category.
In #4, we are talking non-Thai bank??? That is, you have to show what is in your non-Thai bank account, (since I do not have a Thai bank account).