Thank you Terpe and sars_notd_virus for your replies.
sars_notd_virus
By "NSO record can be sorted out" I was meaning that once the 2nd annulment had finalised, the record of her 2nd marriage would be cleared at the NSO, and she would be single again.
Will it be necessary to submit both annotated marriage certificates, decision & finality documents for a visa application? If so, will it not be immediately obvious the 2nd marriage occurred before the first was annulled? Her only legal marriage is her first one.
Thanks
Bruce