Block 9: Check the type of special service on the article, if  any.     For  Certified  and  Return  Receipt  for Merchandise  mail,  you  must  also  enter  the  special service number.   For example, 7000 0600 0023 4109 5793 (for Certified mail). Block  10:   Check  the  appropriate  box  to  indicate  the location where the article was deposited or mailed from. Then enter the city, state, and ZIP Code for the location checked.  For example, Columbia, SC 29204. Block 11:   Enter a detailed description of the article’s content. Block 12:  Enter the content’s value.  If no value, enter “NO VALUE.” PROCESS PS FORM 1510 After  completing  Part  II-A  from  the  information the sender or addressee provided, processing PS Form 1510 varies according to the origin of inquiry and type of mail. The flowcharts for the different types of inquiries listed  below  are  illustrated  in  chapter  1  of  the  POM, and are used to determine what steps to follow when processing PS Form 1510.   Inquiry Filed by Sender for Ordinary Mail   Inquiry Filed by Addressee for Ordinary Mail   Inquiry Filed by Sender for Certified Mail   Inquiry Filed by Addressee for Certified Mail Figure 10-3 is an extract from the POM of the first flowchart  listed  showing  the  steps  to  take  when  an inquiry has been filed by the sender for ordinary mail. As seen in figure 10-3, the first step would be to send Parts II-D and II-E to the ISOSG; then you would forward  the  PS  Form  1510  to  the  Office  of  Mailing (Claims   Section)   so   they   can   search   their loose-in-mails section. Normally  when  the  sender  files  the  complaint  at the  office  of  mailing,  a  search  would  be  made  and depending on whether the article was or was not found, you continue with the steps on the flowchart. 10-5 Send IID and IIE Immediately to ISOSG Manager Office of Mailing (Claims Section) Search Loose-in-Mails Section Send IIC and IV to Sender Destroy Remaining Parts of Form Send I and IIA to Addressee Addressee Acknowledge Receipt Send IIC and VI to Sender Destroy Remaining Parts of Form Addressee Denies Receipt Send IIB and IV to MRC (Serving Office of Mailing) Send IIC and IV to Sender Destroy Remaining Parts of Form Send IIC and IV to Sender Destroy Remaining Parts of Form Send IIB and IV to MRC (Office of Address) Send IIC and IV to Sender Destroy Remaining Parts of Form Send IIC and VI to Sender Destroy Remaining Parts of Form Addressee Does Not Reply Within 20 Days Send IIC and VI to Sender for Assistance Sender Advises Non-Receipt Sender Advises Receipt Sender Does Not Reply Within 90 Days Destroy Remaining Parts of Form Destroy Entire File Not Found Found MRC - Mail Recovery Center Value $10.00 or More Value $10.00 or Less or Unidentified Found Not Found Found Not Found PCf1003 Figure 10-3.     An example of a flowchart, PS Form 1510, Inquiry Filed by Sender for Ordinary Mail.