ðɪ ˌeɪtʃtˌiːtˌiːpˈiː wˈʌn.wˈʌn spˌɛsɪfɪkˈeɪʃən ˌɪntɹədˈuːst ðɪ ˌeɪtʃtˌiːtˌiːpˈiː θɹˈiːhˈʌndɹɪd θɹˈiː"sˈiː ˈʌðɚ"ɹᵻspˈɑːns kˈoʊd tʊ ɛnʃˈʊɹ ðæt ɪn ðɪs sˌɪtʃuːˈeɪʃən, bɹˈaʊzɚz kæn sˈeɪfli ɹᵻfɹˈɛʃ ðə sˈɜːvɚ ɹᵻspˈɑːns wɪðˌaʊt kˈɔːzɪŋ ðɪ ɪnˈɪʃəl pˈoʊst ɹᵻkwˈɛst təbi ɹᵻsəbmˈɪɾᵻd.
The HTTP 1.1 specification introduced the HTTP 303 ("See other") response code to ensure that in this situation, browsers can safely refresh the server response without causing the initial POST request to be resubmitted.