courtesy call

noun
1
a formal or official visit, usually by one important person to another, just to be polite, not to discuss important business
دیدار تشریفاتی, دیدار احترام‌آمیز, ملاقات تعارفی
2
a phone call from a company to one of its customers, for example to see if they are satisfied with the company’s service
تماس پیگیری, تماس بازخورد