Combined declaration of use & incontestability under Sections 8 & 15
You may file a Combined Declaration of Use & Incontestability under Sections 8 & 15 only if you have continuously used a mark registered on the Principal (not Supplemental) Register in commerce for five (5) consecutive years after the date of registration. You must file the Combined Declaration, specimen, and fee on a date that falls on or between the fifth (5th) and sixth (6th) anniversaries of the registration (or, for an extra fee of $100.00 per class, you may file within the six-month grace period following the sixth anniversary date). If you have NOT continuously used the mark in commerce for five (5) consecutive years, you must still file a Section 8 Declaration. You must subsequently file a Section 8 declaration, specimen, and fee on a date that falls on or between the ninth (9th) and tenth (10th) anniversaries of the registration, and each successive ten-year period thereafter (or, for an extra fee of $100.00 per class, you may file within the six-month grace period). FAILURE TO FILE THE SECTION 8 DECLARATION WILL RESULT IN CANCELLATION OF THE REGISTRATION.
NOTE: Because the time for filing a ten-year Section 8 declaration coincides with the time for filing a Section 9 renewal application, a combined §§ 8 & 9 form exists, below.
NOTE:  The USPTO considers powers of attorney to end upon either (1) the date of registration; or (2) the final acceptance or denial of a required post-registration filing. Therefore, if you are an attorney and file this form, the USPTO will presume that you are now the registrant's attorney. The filing of this form will automatically update the "Attorney of Record" and the "Correspondence Address" data fields in the USPTO's TARR database.  After submission of this form, it is not necessary to file a separate Appointment of Attorney form or Change of Correspondence Address form.  Once the USPTO recognizes an attorney with respect to the submission of a required post-registration filing, such as an affidavit under Section 8, an application for renewal under Section 9, etc., the USPTO will recognize only that attorney for all submissions related to that filing, such as responses to Office actions, petitions, etc., unless and until the registrant revokes and appoints a new power of attorney.

Declaration of Use of a Mark under Section 8 (File between the 5th & 6th year after registration)
You must file a Section 8 declaration, specimen, and fee on a date that falls on or between the fifth (5th) and sixth (6th) anniversaries of the registration (or, for an extra fee of $100.00 per class, you may file within the six-month grace period following the sixth (6th) anniversary date). FAILURE TO FILE A SECTION 8 DECLARATION WILL RESULT IN CANCELLATION OF THE REGISTRATION.
NOTE: The combined §§ 8 & 9 form (see below) is due every 10 years after registration.
NOTE:  The USPTO considers powers of attorney to end upon either (1) the date of registration; or (2) the final acceptance or denial of a required post-registration filing. Therefore, if you are an attorney and file this form, the USPTO will presume that you are now the registrant's attorney. The filing of this form will automatically update the "Attorney of Record" and the "Correspondence Address" data fields in the USPTO's TARR database.  After submission of this form, it is not necessary to file a separate Appointment of Attorney form or Change of Correspondence Address form.  Once the USPTO recognizes an attorney with respect to the submission of a required post-registration filing, such as an affidavit under Section 8, an application for renewal under Section 9, etc., the USPTO will recognize only that attorney for all submissions related to that filing, such as responses to Office actions, petitions, etc., unless and until the registrant revokes and appoints a new power of attorney.

Combined declaration of use in commerce/application for renewal of registration of mark under Sections 8 & 9 (File every 10 years after registration)
You must file a Section 8 declaration, specimen, and fee on date that falls on or between the ninth (9th) and tenth (10th) anniversaries of the registration, and each successive ten-year period thereafter (or, for an extra fee of $100.00 per class, you may file within the six-month grace period). Also, you must file a renewal application within the same period (or, for an extra fee of $100.00 per class, you may file within the six-month grace period following the registration expiration date). FAILURE TO FILE THIS DOCUMENT WILL RESULT IN CANCELLATION/EXPIRATION OF THE REGISTRATION.
NOTE: Because the time for filing a ten-year Section 8 declaration coincides with the time for filing a Section 9 renewal application, use this combined §§ 8 & 9 form.
NOTE:  The USPTO considers powers of attorney to end upon either (1) the date of registration; or (2) the final acceptance or denial of a required post-registration filing. Therefore, if you are an attorney and file this form, the USPTO will presume that you are now the registrant's attorney. The filing of this form will automatically update the "Attorney of Record" and the "Correspondence Address" data fields in the USPTO's TARR database.  After submission of this form, it is not necessary to file a separate Appointment of Attorney form or Change of Correspondence Address form.  Once the USPTO recognizes an attorney with respect to the submission of a required post-registration filing, such as an affidavit under Section 8, an application for renewal under Section 9, etc., the USPTO will recognize only that attorney for all submissions related to that filing, such as responses to Office actions, petitions, etc., unless and until the registrant revokes and appoints a new power of attorney.

Declaration of Incontestability of a Mark under Section 15
To claim that a mark registered on the Principal Register is now incontestable, you must file a Section 15 declaration once the mark has been in continuous use in commerce for a period of five (5) years after the date of registration, or date of publication under § 12(c), and the mark is still in use in commerce. (Section 15 does NOT apply to marks on the Supplemental Register). You may file this declaration within one (1) year after the expiration of either any five-year period of continuous use following registration, or any five-year period of continuous use after publication under § 12(c).
NOTE: Because the time for filing a Section 8 declaration coincides with the time for filing a Section 15 declaration of incontestability for many applicants, a combined §§ 8 & 15 form exists, above.
NOTE:  The USPTO considers powers of attorney to end upon either (1) the date of registration; or (2) the final acceptance or denial of a required post-registration filing. Therefore, if you are an attorney and file this form, the USPTO will presume that you are now the registrant's attorney. The filing of this form will automatically update the "Attorney of Record" and the "Correspondence Address" data fields in the USPTO's TARR database.  After submission of this form, it is not necessary to file a separate Appointment of Attorney form or Change of Correspondence Address form.  Once the USPTO recognizes an attorney with respect to the submission of a required post-registration filing, such as an affidavit under Section 8, an application for renewal under Section 9, etc., the USPTO will recognize only that attorney for all submissions related to that filing, such as responses to Office actions, petitions, etc., unless and until the registrant revokes and appoints a new power of attorney.