A range of formats is useful. You are probably not going to be able to open all of them, but it’s good to have them if people ask. Here is the list of formats I provide new logos in, but your designer should always be happy to send you a format or help with format questions
You may also want to request a version of your logo which is just the icon (no words), with and without the strapline. Finally you may want more than one colour variation, for example a version you could use on dark coloured backgrounds.
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