As co signer to our condo lease, can my wife - A Thai, apply for online TM30 registrations - basically of me her husband on an "O" visa extension of stay, if we change house or travel away from home?
TLDR : Answer Summary
The wife, being Thai and a co-signer of the condo lease, can apply for TM30 registrations on behalf of her husband, who holds an O visa. It's advisable to consult the contract with the owner first, or to obtain a power of attorney from the owner for the registration process.