New York ( CNN ) -- Some families of 9/11 victims say they are confused , anxious and surprised as the 10th anniversary approaches because they have not received invitations to the Sunday ceremony opening the ground zero memorial . Gillian Joseph , who lost her husband Stephen in the terrorist attack on the World Trade Center , said she is thinking of canceling her plans to attend the memorial because the whole thing seems so disorganized . `` There was no notification . I made reservations not knowing what the final plans were . I still have n't received an official invitation , '' Joseph said . She added that the last thing she wants for herself and her 12-year-old son is have to deal with a large crowd and make a `` hard day even harder . '' Joseph said she has made several calls to the New York mayor 's office about her missing invitation without hearing back . So did Ansu Philip , who said the mayor 's office finally told her after several days of calling that she would be receiving the invitation last week but she still has not received it . It 's been 10 days since she spoke to the mayor 's office , and she is anxious to make sure she and her relatives can attend the memorial to honor her daughter , Sneha Anne Philip . And a widow who did not wish to be identified told CNN while she did not receive an official invitation , she assumed there would be some kind of memorial . `` We made plans knowing that something was going to happen . My friend will take us with her . She got two invitations , I got none , '' she said . The woman still feels she should have gotten her own invitation , especially since she says she has never had any problems receiving memorial notifications in the past . `` I 'm appalled , surprised , and irritated . This just makes things more difficult , '' the widow said . The confusion and anxieties surround official invitations -- or lack of them -- for the Sunday morning service that will mark the opening of the National September 11 Memorial at ground zero . The ceremony starting at 8:30 a.m. will include the reading of the names of victims and two moments of silence to mark the times the towers were hit . Family members will be allowed in the memorial , where they will see for the first time their loved ones ' names inscribed in bronze . Meanwhile , New York City Mayor Michael Bloomberg 's office said in a statement on Sunday : `` We communicate regularly with the family members and have recently sent out letters and e-mails about this year 's ceremony . Family members have direct access to our staff for any questions that arise , and we 'll have staff on site that day to resolve any issues . So while we apologize for any confusion , there is no reason for any family member to be concerned about not being able to attend the ceremony . '' Joe Daniels is the president and CEO of the 9/11 memorial . He said he has reached out to victims ' families , letting them know that if they have not yet received an official invitation , they will be able to use alternate methods to identify themselves for admission to the ceremony . `` I want to assure you that nothing has changed from years past in terms of access to the ceremony , '' Daniels said . That offers little consolation to family members who want a real invitation that will guarantee them entry . Lois Paterson-Gallo worries that trying to get into the ceremony with other identification methods will complicate getting in , and that will add more stress and anxiety . `` I want the official invitation to cut down on the hassle the day of the memorial . I do n't feel totally comfortable that this is going to work , '' she said . Laurie Mirak , whose husband died on 9/11 , is traveling and said she wo n't be back home to get her invitation until after September 11 , if in fact it arrives . She has been relying on a website for the 9/11 community of families -- Voices of September 11th -- for information . She plans to bring her husband 's death certificate to gain entry to the memorial . Mirak said she is planning on taking part in all of the memorials for her husband and the other victims , and has invitations to all events -- except the ground zero memorial ceremony Sunday morning . Not everyone has had a problem receiving an invitation , though . Elaine Hughes , whose son Kris died on 9/11 , received her cardboard invitation in the mail two weeks ago . She thinks the whole issue of invitations is getting blown out of proportion and is confident that `` if you 're a family member , they 're going to let you in . '' Patricia Tamuccio , who lost a son , was anxious until her invitation arrived in the mail last Thursday . She plans to bring other relatives and she received a notice telling her that she was permitted to bring guests . David de Vere from the United Kingdom , who lost a relative on 9/11 , received his invitation in plenty of time to plan a visit and he said he wonders if some people just were n't in the correct database .
A ceremony Sunday morning will open the 9/11 memorial at ground zero . Some families of 9/11 victims say they have yet to receive invitations . The mayor 's office says staff on site that day will resolve any issues of admission . TL;DR Mayor Bloomberg is expected to attend a service for those killed in the Sept. 11 attacks, but he has not made an official announcement about his plans.