if s3Err = reqSignatureV4Verify(r, globalSite.Region(), serviceS3); s3Err != ErrNone {
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(s3Err), r.URL)
			return
		}
		if !skipContentSha256Cksum(r) {
			sha256hex = getContentSha256Cksum(r, serviceS3)
		}
	}

	if _, ok := r.Header[xhttp.MinIOSourceReplicationCheck]; ok {