When it comes to attaching a receipt to a document, it's helpful to have some relevant and diverse vocabulary at your disposal. There are a range of synonyms for "attached with a receipt" that can add variety and precision to your writing. Some options include "enclosed with proof of purchase," "affixed with invoice," "included with transaction record," "accompanied by sales receipt," and "annexed with a printed statement." Each of these phrases conveys the same core meaning as "attached with a receipt," but with a unique twist that might be better suited to the context or tone of your writing.