When traveling abroad, the use of credit cards varies from country to country. Take the United States as an example. Usually, credit cards with the Master or Visa logo need to be signed (countersigned) before they can be used in most businesses, and it is a routine requirement to show identification. Even if a regular merchant has a back sign, he may ask for an ID. However, in small shops or fast food restaurants, the requirements for signature may be relaxed, and the password and ID may not even be checked. I have encountered that even if the Master savings card is not endorsed, it will be required to provide the ID, and the clerk may suggest that you sign it when you consume it; Credit cards may or may not require an ID, depending on the specific business, especially for small transactions. In some cases, the clerk will check the notes on the spot to confirm the information.

personally, if you use your husband's card, as long as he doesn't audit the account and the clerk doesn't check it, even if the signature is different, it's not a big problem. However, to be on the safe side, it's best to have a spare card in case you need to verify your identity, and you can replace it in time when you can't use it. Generally speaking, despite these regulations, credit cards can be used in travel as long as they are prepared and communicated, but the specific situation needs to be operated according to the regulations of local merchants. I hope this information will help you.