Tex. Business & Commerce Code § 9.611

(a) In this section, "notification date" means the earlier of the date on which:

(1) a secured party sends to the debtor and any secondary obligor an authenticated notification of disposition; or

(2) the debtor and any secondary obligor waive the right to notification.

(b) Except as otherwise provided in Subsection (d), a secured party that disposes of collateral under Section 9.610 shall send to the persons specified in Subsection (c) a reasonable authenticated notification of disposition.

(c) To comply with Subsection (b), the secured party shall send an authenticated notification of disposition to:

(1) the debtor;

(2) any secondary obligor; and

(3) if the collateral is other than consumer goods:

(A) any other person from which the secured party has received, before the notification date, an authenticated notification of a claim of an interest in the collateral;

(B) any other secured party or lienholder that, 10 days before the notification date, held a security interest in or other lien on the collateral perfected by the filing of a financing statement that:

(i) identified the collateral;

(ii) was indexed under the debtor's name as of that date; and

(iii) was filed in the office in which to file a financing statement against the debtor covering the collateral as of that date; and

(C) any other secured party that, 10 days before the notification date, held a security interest in the collateral perfected by compliance with a statute, regulation, or treaty described in Section 9.311(a).

(d) Subsection (b) does not apply if the collateral is perishable or threatens to decline speedily in value or is of a type customarily sold on a recognized market.

(e) A secured party complies with the requirement for notification prescribed by Subsection (c)(3)(B) if:

(1) not later than 20 days or earlier than 30 days before the notification date, the secured party requests, in a commercially reasonable manner, information concerning financing statements indexed under the debtor's name in the office indicated in Subsection (c)(3)(B); and

(2) before the notification date, the secured party:

(A) did not receive a response to the request for information; or

(B) received a response to the request for information and sent an authenticated notification of disposition to each secured party or other lienholder named in that response whose financing statement covered the collateral.