I would expect this to be one of the False widow spiders (Steatoda sp). rather than a Black Widow spider (Latrodectus sp.), but can't guarantee from this image. It will most likely be Steatoda grossa, which is arguably the most Widow-like of the six False Widow species - but how do you tell? Well the black widow species usually will have a distinct hour glass red marking on the belly and the False Widows do not, also Black Widows truly are pitchy black in colour whereas false widows are purple-ish brown if you look closely. Usually I would have no hesitation in identify an image like this of a spider found in a garage as Steatoda grossa but as overseas travel is mentioned it would be best to have a closer look - still 99.9% likely to be Steatoda grossa, which is as I say purple-ish brown never truly a pitchy black.