In the Name of Allaah, may the Salaah and Salaam of Allaah be upon His Final Messenger, to proceed: Muslims are obliged to send Allaah's Salaah  and Salaam  upon Muhammad (sallallaahu 'alayhe wa sallam) when his name is mentioned. Allaah has commanded us : ( Verily Allaah and His Angels send salaah on the Prophet. O you who believe! Invoke salaah upon him, as well as a complete salaam! ) And the Messenger of Allaah (sallallaahu 'alayhe wa sallam) said: "For each time someone invokes salaah upon me, Allaah writes for him ten good rewards because of it."  And the Prophet (sallallaahu 'alayhe wa sallam) had described the one who does not send salaah upon him when he is mentioned as "the stingiest of people."  And he exclaimed "Aameen!" to Jibreel's supplication, "May Allaah repel the one who hears mention of you and does not invoke any salaah upon you!"  So here is the issue that needs to be clarified: Many people use the abbreviation "(sallallaahu alayhi wasallam)" or "PBUH" to fulfill this obligation in their writing. Is this something that fulfills the obligation of sending the salaah and salaam on the Messenger? Let us look now to some of the statements of the scholars regarding this practice. Bakr Aboo Zayd said, "The safe practice, the way of true love, (seeking) reward (from Allaah), respect and honor for the Prophet of this nation is to send the salaah and salaam upon him when he is mentioned (sallallaahu 'alayhe wa sallam), carrying out the order of Allaah and the guidance of his Prophet (sallallaahu 'alayhe wa sallam). For this reason, written abbreviations or symbols used to represent salaah and salaam upon the Messenger (sallallaahu 'alayhe wa sallam) are prohibited. Some examples of these are: SAAD, SAAD-'AYN-MEEM, SAAD-LAAM-'AYN-MEEM, SAAD-LAAM-MEEM, SAAD-LAAM-YAA'-WAAW, and SAAD-LAAM-'AYN."  These example are all used in some 'Arabic books. The English equivalents of these abbreviations would be: (sallallaahu alayhi wasallam), (sallallaahu alayhi wasallam), SAAWS, PBUH, and the likes. 'Abdul-Qaadir Al-Maghribee said, "As for SAAD-LAAM-'AYN-MEEM, it seems as if it was invented in the 9th century after Hijrah. In the explanation of the Alfiyyah of Al-'Iraaqee, a book about the sciences of Hadeeth, the author says, "Abbreviations must be avoided, as well as neglecting it." This means that one should stay away from symbols and not abbreviate it by removing some of its letters, rather he should employ it ("sallallaahu 'alayhe wa sallam") fully in his speech and writing. The author, Shaykh Zakariyyaa Al-Ansaaree, then mentioned that Imaam An-Nawawee related that there is consensus among those who are relied upon that it is legislated to send salaah upon the Prophet (sallallaahu 'alayhe wa sallam) in speech as well as writing. So therefore, it not from the Sunnah to use symbols or abbreviations in place of it. Then Shaykh Al-Ansaaree mentioned that the first one to use a symbol for it, his hand had been cut off, and Allaah's Refuge is sought…"  Ibn Hajr Al-Haythamee said, "The word "SAAD-LAAM-'AYN-MEEM" is not permissible. Rather, it is binding on us to send the salaah and the salaam."  Al-Fayrooza-abaadee said, "It is not appropriate to use symbols or abbreviations to refer to salaah and salaam, as some of the lazy ones do, as well as some ignorant people and even some students of knowledge - they write 'SAAD-LAAM-'AYN-MEEM' instead of writing 'sallallaahu 'alayhe wa sallam.'"  Ahmad Shaakir said, may Allaah have mercy on him, "It is the absurd tradition of some of the later generations that they abbreviate the writing of 'sallallaahu 'alayhe wa sallam.'"  Wasee Allaah 'Abbaas, may Allaah preserve him, said: "It is not permissible to abbreviate the salaams in general in one's writing, just as it is not permissible to abbreviate the salaah and salaam on the Prophet (sallallaahu 'alayhe wa sallam). It is also not permissible to abbreviate either of these in one's speech."  And Allaah knows best. May the most perfect and complete salaah and salaam be upon our beloved Messenger, and upon his noble family and companions. FOOTNOTES  Sending salaah on the Prophet (sallallaahu 'alayhe wa sallam) means that one invokes Allaah to praise him and mention his high status to the angels. See Jalaal Al-Afhaam (p.253) of Ibn Al-Qayyim, Fat-hul-Baaree (11/179-197) of Ibn Hajr, or Ibn Katheer's tafseer to verse 33:56.  salaam: security  the meaning of Soorah Al-Ahzaab (33):56  an authentic hadeeth collected by Ibn Hibbaan in his Saheeh (#906, 3/187) on the authority of Aboo Hurayrah (may Allaah be pleased with him). Al-Albaanee declared it to be saheeh in Silsilatul-Ahaadeeth As-Saheehah (#3359, 7/1080).  from a hasan hadeeth collected by Ibn Abee Ad-Dunyaa in As-Salaah 'Alan-Nabee (p.30-31) on the authority of Aboo Tharr (may Allaah be pleased with him). Hamdee As-Salafee called it hasan in his checking of the book.  from an authentic hadeeth collected by At-Tabaraanee in Al-Mu'jam Al-Kabeer on the authority of Jaabir ibn Samurah (may Allaah be pleased with him). Al-Albaanee authenticated it in his checking of Al-Munthiree's At-Targheeb wat-Tarheeb (#1677,2/298).  Mu'jam Al-Manaahee Al-Laf-thiyyah (p.188)  Mu'jam Al-Manaahee Al-Laf-thiyyah (p.188-189)  Al-Fataawaa Al-Hadeethiyyah (p.168)  From his book As-Salaatu wal-Bushr, as quoted in Mu'jam Al-Manaahee Al-Laf-thiyyah (p.351)  the Musnad of Imaam Ahmad (#5088, 9/105)  from a handwritten answer given to me by the shaykh (I have it on file #AAWA004 dated 1423/6/24) Taken from a post by Aboo Moosaa Richardson on another forum, may Allaah reward him.